Abstract
Prunus pananensis Z. L. Chen, W. J. Chen & X. F. Jin, a new species of Rosaceae from central Zhejiang, China is described and illustrated. Micromorphological characters of the indumentum on young shoots, leaves, petioles and peduncles, including scanning electron microscope [SEM] images, are provided. This new species is morphologically similar to P. schneiderianae Koehne in having its young shoots, petioles and pedicels all densely villose, but differs in having bracts persistent, styles glabrous, stipules 8–9 mm long, stamens 28–30 of per flower, and drupes glabrous. The new species is also similar to P. discoidea (Yü & C. L. Li) Yü & C. L. Li ex Z. Wei & Y. B. Chang in having 2 or 3 flowers in an umbellate inflorescence, and bracts persistent and marginally glandular, but it differs in having young shoots and petioles densely covered with yellowish-brown villose trichomes; leaves rounded or slightly cordate at base, the mid-ribs and lateral veins abaxially densely covered with yellowish-brown villose trichomes; and hypanthium ca. 3 mm long, shorter than sepals. The atpB-rbcL and trnL-F intergenic chloroplast spacers are selected for identification of the new and its similar species.
Highlights
Fruit type, carpel numbers and ovary position are frequently used for the traditional classification of the family Rosaceae
The PCR program began at 94uC for 1 min, followed by 34 cycles of SEM observation The indumentum on young shoots, leaves, petioles and peduncles of Prunus discoidea, P. schneideriana and P. pananensis was observed using a Philips XL-30E scanning electron microscope (SEM)
Phylogenetic relationships were analyzed with PAUP* 4.0b10 for maximum parsimony (MP) and MrBayes v.3.0b4 for Bayesian inference (BI), respectively [17,18]
Summary
Carpel numbers and ovary position are frequently used for the traditional classification of the family Rosaceae. Cerasus is no longer recognized at the generic rank in most floras, this subgenus has been treated as an independent genus with several sections in China. During 2010 to 2012, the senior author (Jin) organized botanical trips in Dapanshan National Natural Reserve and the adjacent regions of Pan’an County, Zhejiang Province, China. In these trips, previously undescribed species of Prunus in sect. This species is morphologically similar to P. schneiderianae Koehne in having young shoots, petioles and pedicels that are all densely villose, but differs in having bracts persistent, styles and drupes glabrous, stipules 8–9 mm long, and stamens 28–30 of per flower.
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