Cordate Leaf Base Research Articles

Three new species of Boesenbergia (Zingiberaceae) from Sabah, Malaysia.

Three new species of Boesenbergia, B.bosuangii sp. nov., B.ganaensis sp. nov. and B.gokusingii sp. nov. were discovered in Sabah, Malaysia. Boesenbergiabosuangii is similar to B.stenophylla R.M.Sm. in the narrowly ovate lamina but differs in the shape of the bract and the calyx. Boesenbergiaganaensis is closely allied to B.burttiana R.M.Sm. but differs in the absence of a ligule, the longer petiole, the obtuse leaf base, the acute leaf apex, the bilobed calyx and the anther dehiscing by pores. Finally, B.gokusingii is similar to B.variegata R.M.Sm., by the single leafy shoot but differs in having an unequal, ovate lamina, a cordate leaf base, an acute leaf apex and the anther dehiscing by pores. The three new species are described and illustrated in detail. With the addition of these new species, there are in total 13 species with one variety in Sabah.

Saurauia decolorata (Actinidiaceae), a new species from Mindanao, the Philippines

Saurauia decolorata from the Mt. Pantaron Range, Bukidnon and Mt. Balatukan Natural Park, Misamis Oriental, Mindanao Island, the Philippines, is illustrated and described as a new species. It closely resembles S. avellana and S. elegans in having branchlets, petioles, and abaxial surfaces of the leaves covered with tomentum and scales, densely clustered flowers, longitudinal anther dehiscence, and 3–4 styles. However, S. decolorata is distinguished from these species by its prominent rusty-colored tomentum and scales on branchlets and abaxial leaf surfaces, cordate leaf bases, crenate margin, 16–21 pairs of lateral veins, fascicled-cymose inflorescences that are both axillary and ramiflorous, and sparsely scaly pinkish green outer sepals. This discovery further emphasizes the unique biodiversity of the forests of the Pantaron Range and Mt. Balatukan which urgently need legislative protection and enhanced protected area management plans, respectively.

Medinilla campana, M. flammea, M. purpureoviridis and M. rangkong (Melastomataceae), four new species from Borneo

Four new species of Medinilla from Borneo, M. campana, M. flammea, M. purpureoviridis and M. rangkong are described and illustrated based on morphological characteristics. Medinilla campana most resembles M. rubicunda but differs from it by having campanulate hypanthium that thickens significantly towards the distal end (vs. cupuliform and not thickened) and the anther has an underdeveloped, obtuse dorsal spur (vs. well-developed, beak-like dorsal spur). Medinilla flammea is similar to M. rubicunda, but differs in having erect to suberect habit (vs. spreading), the inner pair of lateral veins in the lamina diverges from the midrib above the base (vs. veins diverged from the base) and orange to vermilion petals (vs. white). Medinilla purpureoviridis is somewhat similar to M. laxiflora, but it can easily be distinguished from the latter by its 4-merous flowers (vs. 5-merous) and the cymose branching of approximately 3 times (vs. 5 to 9 times). In addition, the hypanthium is distally thickened (vs. not thickened in M. laxiflora). Medinilla rangkong most resembles M. sessiliflora, but differs in its cordate leaf base (vs. acute), the lateral two veins diverging from the base (vs. departing about 5 mm from the base of midvein), and the hypanthium with four minutely apiculate teeth (vs. with four conspicuous, triangular calyx lobes).

Viola pendulipes (Violaceae), a new species from Guangdong Province, China

Viola pendulipes (Violaceae), a new myrmecochous species from Baiwan Nature Reserve of Guangdong Province in China, is described and illustrated. Morphologically the new species is most similar to V. nanlingensis, but it is easily distinguished by having truncate or cuneate leaf base (versus cordate leaf base), robust rhizome with short internodes (versus slender rhizome with long internodes), curved and drooping peduncles in fruit (versus erect peduncles in fruit), and oblong anterior petals (versus spatulate to rhombic anterior petals). Our phylogenetic analysis, based on ITS sequences, confirms that the new species belongs to V. subsect. Diffusae, and is most closely related to V. yunnanensis.

Callicarpa stoloniformis (Lamiaceae), a new species from Southeast China based on morphological characters and phylogenetic evidence.

Callicarpa stoloniformis sp. nov. (Lamiaceae) is described as a new species from Fujian Province of China on the basis of both morphological and molecular data. The new species is morphologically most close to C. hainanensis. However, it can be distinguished from the latter by its unique procumbent life form, adventitious roots at nodes, papery leaves, cup-shaped or campanulate calyx, truncate or shallow fissure calyx lobes, and smaller fruits. In addition, the new species is also similar with C.basitruncata, a species only known from the original description and the photograph of holotype, but it can differ from the latter by its procumbent shrub, purple terete branchlets with apparent linear lenticels, adventitious roots at nodes, and papery larger leaves with prominently cordate leaf base. Original photographs, illustration, distribution map, and a comparative morphological table, as well as an identification key of the related taxa are provided.

Paraphlomisjinggangshanensis (Lamiaceae), a new species from Jiangxi, China.

Paraphlomisjinggangshanensis (Lamiaceae), a new species from Jiangxi Province, China, is described and illustrated. The new species is morphologically similar to P.intermedia, but can be easily distinguished from the latter by its cordate leaf base (vs. cuneate, decurrent), stem and calyx tube with glandular hairs (vs. short pubescent), and glabrous anthers (vs. ciliate anthers). A phylogenetic analysis, based on ITS regions, suggests that P.jinggangshanensis represents a separate branch in Paraphlomis and is closely related to Clade II. It is currently known only from Jinggangshan National Natural Reserve. Because of its limited distribution and small population size, the species was assessed as Near Threatened (NT) according to the IUCN Red List Categories and Criteria.

Piper Ribesioides Wall., a Newly Recorded Species for the Flora of Vietnam

We here reported a newly recorded Piper species for the flora of Vietnam, namely Piper ribesioides Wall. (Piperaceae). This species is most morphologically similar to P. politifolium C.DC. by sharing glabrous plants and fruits with a stipe, but it differs from the latter having a monoecious habit (vs. dioecious), stamens 4 (vs. 2), and a cordate leaf base with equal or subequal lobes (vs. oblique with unequal lobes). Descriptions, illustrations, information on ecology, and taxonomic notes of the species is provided.

<p><strong>Revision of <em>Begonia</em> (Begoniaceae) in Bidoup-Nui Ba National Park, Southern Vietnam, including two new species</strong></p>

The Begonia species occurring in Bidoup-Nui Ba National Park (Lam Dong Province, southern Vietnam) are reviewed based on recent floristic field surveys. Five species were recognized from the montane forests, and two of which are new to science. The new species belong to Begonia sect. Platycentrum and are named as B. hongiaoensis C.W.Lin, T.C.Hsu & Luu and B. lamdongiana C.W.Lin, T.C.Hsu & Luu, repectively. Begonia hongiaoensis most closely resembles B. siamensis Gagnep from northern Thailand. Both species have a rhizomatous habit and bear ovate leaves. However, the new species differs by its stoloniferous habit, shallowly cordate leaf base and 5-tepaled pistillate flowers. Begonia lamdongiana is similar to B. coelocentroides Y.M.Shui & Z.D.Wei, a hairy leaf species of the same section in Yunnan of China, but is markedly distinct in its glabrous petioles, inflorescences, pedicels and ovaries, and larger bracts.

Sonerilacardamomensis (Melastomataceae), a new species from Cambodia.

Sonerilacardamomensis, a new species of family Melastomataceae from the Central Cardamom Protected Area in Koh Kong province of southwestern Cambodia, is described and illustrated. The species is similar to S.violifolia Hook.f. ex Triana, but is readily distinguished by its cordate leaf base, lack of setae at the nodes, longer pedicels, smaller petals, smaller hypanthiums and smaller capsules.

Monteiroa rubra (Malvaceae: Malvoideae), a New Species Endemic to the Southern Brazilian Grasslands

Abstract—Monteiroa rubra is described as a remarkable new species from Rio Grande do Sul, Brazil. It is notably distinct from the other ten species of Monteiroa. The new species is morphologically most similar to the four species of the genus with unlobed leaves that also lack cordate leaf bases. Monteiroa rubra apparently is an endemic species known from three localities in wetlands associated with grasslands in Augusto Pestana and Fontoura Xavier municipalities in southern Brazil. A morphological description, distribution map, photographs, ecological notes, and a key to morphologically most similar species are presented. According to IUCN criteria, if a formal assessment were performed, the new species would probably be considered Endangered.

A New Species of Anthurium (Araceae) with Cordate Leaves from Southeastern Brazil

During a floristic survey of Araceae species in the Atlantic Forest, Espírito Santo State, southeastern Brazil, we found an unknown species of Anthurium Schott with cordate leaf bases. Here, we describe and illustrate this new species, A. marcusianum Theófilo, L. Kollmann & Sakur., and also provide comments on its ecology, distribution, and conservation status.

Capparis bachii (Capparaceae), a New Species from Southern Vietnam

Capparis bachii Sy, R.K. Choudhary & Joongku Lee (Capparaceae) is described and illustrated based on a collection from Dong Nai Province, southern Vietnam. It is morphologically similar to C. diffusa but differs from it by having numerous flowers per umbel, numerous stamens per flower, larger gynophore, cordate leaf base, and presence of hairs on leaves.

Four new varieties of Begonia from interspecific hybridization Begonia natunaensis C.W.Lin & C.I.Peng × Begonia puspitae Ardi

Siregar HM. 2016. Four new varieties of Begonia from interspecific hybridization Begonia natunaensis C.W.Lin & C.I.Peng × Begonia puspitae Ardi. Biodiversitas 17: 776-782. Increased phenotypic diversity of ornamental plants (e.g. Begonia) can often be achieved by hybridization and selection in the F1 generation. This study aimed to produce new F1 varieties which it was hoped would display improved phenotypic characteristics compared to the contributing parents. The study was conducted in the green house of Bogor Botanic Gardens. Two native species of Indonesia, Begonia natunaensis C.W.Lin & C.I.Peng and B. puspitae Ardi, were used as parent plants. The mature F1 seeds were sown and selections were made among the plants produced. The result of the selection were four new accessions of F1 plants (X1, X3, X10, X22). The selected F1 plants were then propagated vegetatively with leaf cuttings. These were named, described and registered at the Center for Plant Variety Protection (PPVTPP). This resulted in the registration of the following F1 cultivars: X1 named Begonia Blirik which is registered as No. 347/PVHP/2015 and is characterized by purplish peltate leaves with bright whitish green veins, and white flowers; X3 named Begonia Fiandani, registered as No. 348/PVHP/2015 and characterized by dark green leaf color, corrugated leaf surface, and pink flowers; X10 named Begonia Green Peltate, registered as No. 345/PVHP/2015 and characterized by large green peltate leaves, and red flowers; and X22 named Begonia Natunapangean, registered as No. 346/PVHP/2015, and characterized by eccentrically shaped, green basifixed leaves, with ovate shape, and cordate leaf base. Thus the new varieties have been registered in PPVTPP, in accordance with legislation in force. These new varieties are beautiful ornamental Begonia hybrids with exotic leaves, which will be developed as commercial ornamental plants. Keywords: Begonia natunaensis, Begonia puspitae, Begonia Blirik, Begonia Green peltate, Begonia Natunapangean, Begonia Fiandani, interspecific hybridization

Two new species of the “Gomidesia clade” of Myrcia s.l. (Myrteae, Myrtaceae) from the Atlantic Forest of southern Bahia, Brazil

Two new species of Myrcia from the Atlantic Forest zone of northeastern Brazil are described and illustrated. Both species are restricted to southern Bahia and belong to the “Gomidesia clade” of Mycia s.l., as indicated by the irregular opening on the dorsal side of the thecae. Myrcia pulvinata grows in lowland forest and is morphologically similar to M. spectabilis, from which it differs in its pulvinate petioles, cordate leaf base, and ellipsoid fruits. Myrcia serrana is found in montane forest and is morphologically similar to M. ilheosensis, but it can be distinguished from that species by the greater distances between the inter-secondary veins in the leaves and between the marginal veins and the leaf margin, navicular bracteoles, and larger fruits. Conservation status assessments for the two new species based on IUCN criteria are provided.

Primulina hunanensis sp. nov. (Gesneriaceae) from a limestone area in southern Hunan, China

A new species of Gesneriaceae, Primulina hunanensis, is described and illustrated from southern Hunnan, China. Morphologically, it is similar to P. cordata ( = Chirita cordifolia), but differs by having much larger leaves, broadly ovate or ovate bracts, 2–12 (–25)‐flowers, longer peduncle and purple corolla. It also resembles P. eburnea in the shape of the bracts and the colour of the corolla, but can be distinguished by longer petioles (9–25 cm long), cordate, ovate‐cordate or broadly ovate leaf lamina with rounded or obtuse apex, not entire leaf margin, and either cordate or deeply cordate leaf base. Detailed morphological description, diagnostic comparisons, habitat and micro‐morphology of seeds and pollen under SEM are presented.

A new species of Aristolochia subgenus Siphisia (Aristolochiaceae) from central Vietnam<br />

Aristolochia annamensis, a new species from central Vietnam, is described and illustrated. This new species, belonging to Aristolochia subgenus Siphisia, is characterized by a truncate to slightly cordate leaf base, a strongly constricted, a straight, oblong, cylindrically-shaped upper tube without veins, 3–3.2 cm long, limb subcordate with margin of three lobes somewhat recurved, but not revolute, inner surface of limb smooth, annulus absent, throat densely covered with purple dots. In addition to the description, line drawings, ecology, conservation status as well as comparison with morphologically similar species are provided.

A new species of Memecylon (Melastomataceae) from the Western Ghats, India

Memecylon ponmudianum, a new species of Melastomataceae from Thiruvananthapuram district, Kerala, India, is described and illustrated. The new species resembles M. terminale and M. subramanii but differs from the former by its larger and sessile leaves with cordate and amplexicaul leaf bases, robust and shortly peduncled inflorescences, pedicels distinctly shorter than the campanulate calyx, and from the latter by the terete stem and branchlets, smaller subsessile and amplexicaul leaves, terminal short peduncled umbellate cymes with terete peduncle and the pedicels distinctly shorter than calyx. A key to the Memecylon species with cordate leaf bases occurring in south India and Sri Lanka is also presented.

A NEW SPECIES OF PTEROSPERMUM (DOMBEYOIDEAE, MALVACEAE/STERCULIACEAE) FROM CAMBODIA AND VIETNAM

AbstractPterospermum mengii P.Wilkie (Dombeyoideae, Malvaceae/Sterculiaceae) from Cambodia and Vietnam is described as new to science and illustrated. It is most similar to Pterospermum pecteniforme Kosterm., sharing a distinctive wavy ridge at the margin of each locule of the capsular fruit, but differing by its larger leaves, oblong to obovate leaf shape, deeply cordate leaf base, and stellate indumentum on the undersurface of the leaves and fruit.

Sabia lanceolata Colebr., a newly recorded species of Sabiaceae from China

Sabia lanceolata Colebr. of Sabiaceae is reported as a new record to China. The species is different from other Chinese species in its amplexicaul leaves and cordate leaf-base. It is related to S. parviflora Wall., but differs in its leaf blades elliptic-oblong to lanceolate, base cordate, cymes 10-30-flowered, drupelets obovoid to oblong-obovoid or pyriform, 7-10 mm in diam. Key words Sabiaceae, Sabia, Sabia lanceolata Colebr., new record, China. The genus Sabia Colebr. consists of about twenty-five species. It is distributed in S. E. Asia and Malesian region (Chen, 1943; van de Water, 1980; Law & Wu, 1982; Wu, 1985; Deng, 2001). In the course of revising the genus Sabia in Chinese herbaria, some specimens collected from Xizang were found different from those species reported from China in their leaves amplexicaul and leaf-base cordate (Chen, 1943; van de Water, 1980; Law & Wu, 1982; Wu, 1985; Chen, 1986). Further studies showed that it represents a species, Sabia lanceolata Colebr., which has not yet been reported from China. Sabia lanceolata Colebr. in Trans. Linn. Soc. Lond. 12: 355, t. 14, 181. Type: Bangladesh. Silhet, Colebrooke s.n. (holotype, K!). Sabia kachinica Chen in Sargentia 3: 63, fig. 8. 1943. Type: Myanmar (Burma). Kachin Hills, alt. 600-900 m, 1930-03-12, F. K. Ward 9018 (holotype, A; isotype, BM!). 狭叶清风藤 新拟 An evergreen woody climber or scandent shrub. Twigs glabrous. Leaves elliptic-oblong to lanceolate, 5-22×1.5-8 cm, herbaceous to pergamentaeous, glabrous, base cordate, amplexicaule, margin entire, apex acute or acuminate, lateral veins 6-12 pairs, obvious, straight or sometimes curved; petioles 0-1.2 cm, glabrous. Cymes solitary, axillary, or arranged in an axillary thyrse, 1.5-7 cm long, 10-30-flowered, glabrous; pedicels up to 1.3 cm; bracteoles ovate to oblong-ovate, up to 1.2 mm, often near calyx, glabrous, ciliolate or not. Flowers green to white. Sepals broadly ovate to ovate, 0.7-1.3(-2)×0.7-1(-1.5) mm, acute to obtuse, glabrous, ciliolate or not. Petals oblong-ovate to oblong, 3.5-5.5×1.5-2 mm, acute or narrowly obtuse, veins ca. 6, but often obscure by many granules forming dotted lines. Stamens 1.5-2 mm; filaments flattened, 1-2 mm long, 0.3-0.5 mm wide; anthers globular or ellipsoid, 0.2-0.3 mm long, inflexed. Disk crown-shaped; lobes short, but often with distinctly disciform apices; ribs often faint or absent. Pistil 1.2-1.7 mm; style cylindrical to slightly conical, 0.6-1 mm, much shorter than the adjacent side of the drupelet; ovary broadly transverse-ellipsoid, 0.6-0.7×0.7-1 mm, glabrous. Drupelets distinctly obovoid to oblong-obovoid or pyriform, somewhat compressed, 12-15×7-10 mm, probably blue when fresh, with or without persistent petals and stamens at the base; reticulate pattern faint or

A new species of Uvaria (Annonaceae) from West Africa

When going through the herbarium collections from western Africa for the ECOSYN Project (see acknowledgement) we came across several not yet published new species. Among them was Uvaria sassandrensis described below. Specimens of this new Uvaria species found in the herbaria were sometimes identified as U. thomasii Sprague & Hutch., the only other species in the area with long dark bristly hairs on twig and petiole (Keay, 1954: 35). Both species also have a cordate leaf-base and calyx-lobes that are already distinct in bud. However, the fruit of the new species is smooth whereas the fruit of U. thomasii is spiny and the flowers of the two species are clearly different as well, the petals in U. thomasii are about 3 times as long as wide while the petals of the new species are almost circular. Uvaria thomasii is found in forests from Senegal to Me d'Ivoire, U. sassandrensis is until now only known from Me d'Ivoire.