Reassessment of the Psychotria speciosa G. Forst. (Rubiaceae) complex in Tahiti, Society Islands, with a new combination and description of new species, Psychotria paulae J.-Y. Meyer, Lorence & J. Florence, sp nov

被引：3

作者：

Lorence, David H. ^{[1
]}

Florence, Jacques ^{[2
]}

Meyer, Jean-Yves ^{[3
]}

机构：

[1] Natl Trop Bot Garden, 3530 Papalina Rd, Kalaheo, HI 96741 USA

[2] Museum Natl Hist Nat, Herbier Natl, Case Postale 39,57 Rue Cuvier, F-75231 Paris 05, France

[3] Delegat Rech, Boite Postale 20981, Tahiti, French Polynesi, France

来源：

ADANSONIA | 2017年 / 39卷 / 01期

关键词：

Rubiaceae; Psychotria; French Polynesia; endemism; conservation; invasive plants; lectotypification; new combination; new species; REVISION;

D O I：

10.5252/a2017n1a4

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The genus Psychotria L. (Rubiaceae) is one of the most diverse in the Pacific, including the islands of French Polynesia with 28 described endemic species. The Psychotria speciosa G. Forst. complex is evaluated, and P. speciosa is lectotypified and an epitype designated. The new combination Psychotria trichocalyx (Drake) Fosberg ex J.-Y. Meyer, Lorence & J. Florence, comb. nov., is made based on Calycosia (Uragoga) trichocalyx. The new species Psychotria paulae J.-Y. Meyer, Lorence & J. Florence, sp. nov., endemic to Tahiti (Society Islands), is described and illustrated. It differs from the closely related Psychotria speciosa by having leaves with longer petioles (up to 5 cm long), flowers fewer per inflorescence (1-3) and with longer pedicels up to 15 mm long, calyx with longer tube and short lobes, a 5-7-lobed corolla, longer fruit pedicels up to 4 cm long, and cylindrical to ovoid fruits 2-3 cm long. The conservation of this extremely rare species, known from only one locality on Tahiti and directly threatened by invasive alien plants (proposed IUCN status: CR), is a priority.

引用

页码：41 / 53

页数：13