Species Of Gesneriaceae Research Articles

Primulina titan sp. nov. (Gesneriaceae) from a Limestone Area in Northern Guangxi, China

A new species of Gesneriaceae, Primulina titan, is described and photographed from northern Guangxi, China. It resembles P. hunanensis,but can be distinguished by combined morphological characters of leaf,bract, corolla, stamen and pistil. We found only one population with approx.800 mature individuals at the type locality. This species is provisionally assessed as vulnerable [VU D1] using IUCN criteria.

Oreocharis argentifolia (Gesneriaceae), a new species from the karst region in southeastern Yunnan, China

A new species of Gesneriaceae, Oreocharis argentifolia Lei Cai & Z.L.Dao from Mengzi City, Yunnan Province, China, is described and illustrated. The new species is morphologically most similar to O. panzhouensis Lei Cai, Y.Guo & F.Wen in plant habit, number of stigma lobes and stamens, and the shape of the calyx, but differs in the shape of the leaf blade, indumentum, shape and color of corolla and the adnate position of the filaments. A detailed description, color photographs, distribution and habitat, as well as its morphological relationship with relevant similar species are also provided.

Paraboea dolomitica (Gesneriaceae), a new species from Guizhou, China

Here we describe Paraboea dolomitica Z.Y. Li, X.G. Xiang & Z.Y. Guo, a new species of Gesneriaceae from Guizhou, China. Based on recent extensive observations, this new species is morphologically similar to Paraboea filipes (Hance) Burtt, in having obovate leaf blades, 1–4-flowered cymes and purplish corolla, but differs from that species by the combination of denticulate leathery leaves, sparsely brown haired peduncles, two woolly bracts, reniform anthers and two glabrous staminodes. Additionally, molecular data support this new species as a member of a clade that includes P. crassifolia, P. tetrabracteata, P. peltifolia, P. vetutina, P. dushanensis, P. dictyoneura, P xiangguiensis and P. guilinensis, but it is distinct from them in leaf position, inflorescence, penduncle, bract and capsule. The conservation status of this species is considered to be “Vulnerable” (VU) according to the IUCN Red List Categories and Criteria.

<p><strong>Rediscovery of <em>Aeschynanthus monetaria </em>(Gesneriaceae) in Southeast Tibet, China after more than 100 years</strong></p>

Aeschynanthus monetaria, a beautiful epiphytic species of Gesneriaceae, was rediscovered in monsoon rain forest along the Yarlung Zangbo River in Motuo County, Southeast Tibet (Xizang), China. Its description is amended and completed with both fresh and dried specimens in this discovery. To better facilitate its identification, the color images in the field and line illustrations based on our specimens are given. A taxonomic note concerning its lectotype and the ending of specific epithet is discussed.

Loxostigma puhoatense (Gesneriaceae), a new species from North Central Vietnam.

Loxostigma puhoatense N.D. Do et al., sp. nov., a new species of Gesneriaceae, is described and illustrated from Pu Hoat Nature Reserve, Nghe An Province, Vietnam. This species is morphologically similar to L. dongxingensis and L. damingshanensis in the plant habit, indumentum system of vegetative and reproductive characters, shape of leaf blades, calyx, pistil but differs from the latter two by the abaxially reddish-purple leaf blade with pubescent along veins, lateral veins 11–19, shorter white to pale yellowish-white corolla (3.7–3.8 cm long) with purple-spotted and glabrous inside, longer abaxial stamens in 2–2.1 cm, shorter and densely glandular-puberulent ovary in 1–1.2 cm, and sparsely glandular-puberulent style. Data on distribution, ecology, phenology, and vernacular of the new species are provided.

Hemiboea yongfuensis (Gesneriaceae): a cryptic and critically endangered new species from North Guangxi, China

The limestone region of southern China is a biodiversity hotspot from where numerous rare new species have been or are being described. Here, Hemiboea yongfuensis, a new species of Gesneriaceae from a limestone hill in Guilin, North Guangxi, southern China is described and illustrated. It is similar to H. subcapitata and H. pterocaulis in morphology and coexists with both of them in the same limestone hill, but can be distinguished from the latter two by its quadrilateral stem without winged edges, corolla outside light pink and sparsely glandular‐pubescent and pale pink calyx which is 5‐lobed from base, as well as by molecular data from trnL‐F and ITS. We provide detailed information, including morphological descriptions, illustrations, diagnostic comparisons and molecular phylogenetic affinities of the new species.

Lysionotus chatungii – a new species of Gesneriaceae from Arunachal Pradesh in North-Eastern India

Lysionotus chatungii – a new species of Gesneriaceae from Arunachal Pradesh in North-Eastern India

Petrocodon jiangxiensis (Gesneriaceae), a New Species from Jiangxi, China

Based on morphological, cytological and molecular data, a new species of Gesneriaceae, Petrocodon jiangxiensis F. Wen, L.F. Fu & L.Y. Su from Jiangxi Province, China, is described and illustrated. Morphologically, it resembles the most P. asterocalyx. Both species have axillary cymes, an actinomorphic calyx and similarly shaped corolla, but P. jiangxiensis can be easily distinguished by ovate-elliptic to broadly ovate leaf blades, three bracts with a crenulate to serrate margin, smaller calyx lobes 5–6 × ca. 1 mm, smaller corolla 1.7–2.3 cm long, and glabrous anthers. Petrocodon jiangxiensis has a 2n = 36 somatic chromosome number.

Four new species of Gesneriaceae from Yunnan, Southwest China.

Four new species of Gesneriaceae from Yunnan, southwest China, are described and illustrated. They are Petrocosmea rhombifolia, Petrocosmea tsaii, Didymocarpus brevipedunculatus, and Henckelia xinpingensis. Diagnostic characters between the new species and their morphologically close relatives are provided. Their distribution, ecology, phenology, and conservation status are also described.

Two new species of Henckelia (Gesneriaceae) from Southeastern Yunnan, China.

Two new species of Gesneriaceae, Henckelia nanxiheensis Lei Cai & Z.L.Dao, sp. nov. and H. multinervia Lei Cai & Z.L.Dao, sp. nov. from southeastern Yunnan, China, are described with color photos. The diagnostic characters of the two new species, together with photographs, detailed descriptions, distribution and habitat, as well as comparisons with morphologically similar species, are also provided.

Petrocodon longitubus (Gesneriaceae), a new species from Guizhou, China

Petrocodon longitubus, a new species of Gesneriaceae from Guizhou province, China, is described and illustrated. It is similar to P. hunanensis in having four stamens, but readily differs in being rosulate and stemless and having a narrowly infundibuliform floral tube with the adaxial lip bending upward. Molecular evidence indicates that it is sister to P. hunanensis, but the two species differ markedly in morphology.

Hemiboeaalbiflora, a new species of Gesneriaceae from Guizhou, China.

Hemiboeaalbiflora X.G.Xiang, Z.Y.Guo & Z.W.Wu, sp. nov., a new species of Gesneriaceae from Guizhou, China, is described and illustrated. This species was previously listed informally as a variety of H.gamosepala, but it differs significantly from H.gamosepala by its 5-parted calyx from the base, longer peduncle, white corolla and longer pistil. Based on recent extensive observations, this new species is similar to H.cavalerieivar.paucinervis and H.subcapitata but differs from them by its longer petiole, larger involucre, white corolla and longer staminal filaments. The conservation status of this species is considered to be “Vulnerable” (VU) according to the IUCN Red List Categories and Criteria.

Boeica konchurangensis sp. nov. (Gesneriaceae) from Gia Lai plateau, Vietnam

Boeica konchurangensis B.H.Quang, D.V.Hai & Mich.Möller, a new species of Gesneriaceae from the Gia Lai Province of Vietnam is described, illustrated, and colour photographs of the species are provided. This new species has an almost actinomorphic corolla and shows morphological similarities with B. porosa, but differs from it by a shorter peduncle, a near‐actinomorphic purple corolla with a distinctly broad campanulate tube and a shorter capsule.

Oreocharis panzhouensis (Gesneriaceae), a new species from karst regions in Guizhou, China

A new species of Gesneriaceae, Oreocharis panzhouensis, is described and illustrated from Panzhou City, Guizhou Province, China. The new species is morphologically similar to O. cavaleriei and O. forrestii in corolla shape and color, number of stigmas and stamens, but it can be easily distinguished by the shape of leaf blade and calyx, leaf blade indumentum, filament and pistil indumentum and length, and peduncle length.

Drymonia croatii (Gesneriaceae), a new species from the Pacific slopes of the Colombian Andes

Drymonia croatii, a new species of Gesneriaceae from the Pacific slopes of the Colombian Andes (department of Valle del Cauca) is described and illustrated. Drymonia croatii is similar to D. ovatifolia and D. foliacea; it is differentiated by the following characters: indument on stem and leaves composed of a combination of simple (septate and non-septate) and glandular hairs; peltate glandular hairs on the abaxial surfaces of leaf blades, inflorescence bracts and calyx; corolla tube white with purple veins outside and a yellow ventral canal inside, basal third of the corolla tube narrow, corolla lobes purple with fimbriate margins; and a fleshy capsule with reflexed valves that are light yellow with brown dots adaxially.

FLORA OF NAM KADING NATIONAL PROTECTED AREA VI: DIDYMOCARPUS MIDDLETONII (GESNERIACEAE), A NEW SPECIES FROM LIMESTONE

Didymocarpus middletonii Souvann., Soulad. & Tagane, a new species of Gesneriaceae from Nam Kading National Protected Area, is described and illustrated. The new species is morphologically similar to Didymocarpus brevicalyx, D. formosus and D. puhoatensis but distinguished from the three by its fewer-flowered inflorescence, longer pedicel, and urceolate and multicellular eglandular hairy calyx. Based on the latest IUCN criteria, Didymocarpus middletonii is proposed to be Critically Endangered (CR). Our record of Didymocarpus represents a new genus record for the flora of Laos.

Two new species of Billolivia (Gesneriaceae) with yellow flowers from Vietnam

Billolivia citrina and B. yenhoae are described as new species of Gesneriaceae from Central Vietnam. They are the first taxa of the genus known to have yellow corolla lobes. A key to all eleven species of the genus is given.

Pollen morphology in Brazilian species of Gloxiniinae (Gesneriaceae): variation in apertures and pattern of ornamentation

Gloxiniinae comprises herbs and subshrubs usually growing on rocky outcrops, rocky fields or gallery forests. For Gesneriaceae in some cases variations in pollen morphology allow the differentiation of genera and species. We studied the pollen grains of ten Brazilian species of Gloxiniinae (Gesneriaceae), including the genera Chautemsia, Gloxinia, Goyazia, Mandirola and Seemannia with the purposes of describing the pollen morphology of these genera, and contributing to the taxonomic characterization of the group and a better delimitation of genera and species of Gesneriaceae. The pollen grains were acetolyzed, measured, photographed and described qualitatively. Quantitative data were analyzed through descriptive and multivariate statistics. Non-acetolyzed pollen grains were observed in SEM and TEM in order to provide more details of the ornamentation and the structure of the exine. The analyzed species differ as to the pollen amb, shape, length, width and ends of colpi, presence or absence of margo, type of endoaperture and exine ornamentation. We found circular, subcircular and subtriangular amb, oblate spheroidal and subprolate shape, long or very long colpi, narrow, wide or very wide, with or without margo, lalongate or lolongate endoaperture in microreticulate or reticulate pollen grains. The reticulate ornamentation appears in the Gloxinia species’ pollen grains, and lolongate endoapertures represent the pattern for the subtribe pollen grains except in Chautemsia. The pollen grain metrics examined by principal component analysis allow generic distinction. We conclude that qualitative and quantitative pollen data help to delimit the genera and species of Gloxiniinae.

Two new species of Primulina (Gesneriaceae) from limestone karsts of China.

The limestone karst area of South China is a major biodiversity hotspot of global terrestrial biomes. During extensive field work on the Guangxi limestone formations, two unknown species of Gesneriaceae were collected. After conducting a comprehensive study of the literature and herbarium specimens, Primulina davidioides and P. hiemalis are recognized as two species new to science, and described and illustrated here. P. davidioides is morphologically close to P. lunglinensis based on the shape of the leaf and flower, but it can be easily distinguished by the shape of the bracts, corolla and stigma, indumentum of peduncles, pedicels and pistil and number of staminodes. P. hiemalis is closely relate to P. luzhaiensis in vegetative appearance, but differs in the shape of the calyx and stigma, number of bracts and staminodes, indumentum of the leaf blade and peduncle, and position of stamens in the corolla tube. Considering that not enough is known about their populations, it is proposed that their conservation statuses should currently be classed as data deficient (DD) according to the IUCN Red List Category and Criteria.

Hemiboea suiyangensis (Gesneriaceae): a new species from Guizhou, China.

The limestone areas in south China are a major biodiversity hotspot for terrestrial biomes. Hemiboea, with 34 species and 5 varieties, mainly distributed in south China, is one of the characteristic plant groups in limestone areas. Hemiboea suiyangensis, a new species of Gesneriaceae from limestone areas in Guizhou, China, is described and illustrated. The new species is easily distinguished from other Hemiboea species by having an oblique-infundibular corolla with an abaxially gibbous swelling on the upper half of the tube and with a densely villose throat and lower lobes. Hemiboea suiyangensis is similar to H. omeiensis W. T. Wang in the shape of the leaf blade, but differs from the latter by the shape of the petiole, involucre, calyx and corolla and the colour of the corolla. The conservation status of this species is considered to be “Critically Endangered” (CR) according to IUCN Red List Criteria.