A new species of Mesosetum (Poaceae: Paspaleae: Arthropogoninae) with a winged rachis from Serra da Canastra, Minas Gerais, Brazil

被引：3

作者：

De Oliveira, Regina Celia ^{[1
]}

Dorneles Welker, Cassiano A. ^{[2
]}

Fieker, Carolline Zatta ^{[3
]}

Filgueiras, Tarciso S. ^{[4
]}

Dos Santos Sousa, Mayco W. ^{[1
]}

机构：

[1] Univ Brasilia, Inst Ciencias Biol, Programa Posgrad Bot, Caixa Postal 04457, BR-70910970 Brasilia, DF, Brazil

[2] Univ Fed Uberlandia, Inst Biol, Programa Posgrad Biol Vegetal, Rua Ceara S-N, BR-38400902 Uberlandia, MG, Brazil

[3] Univ Fed Sao Carlos, Dept Ecol & Biol Evolut, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP, Brazil

[4] Inst Bot, Caixa Postal 68041, BR-04045972 Sao Paulo, SP, Brazil

来源：

PHYTOTAXA | 2019年 / 404卷 / 04期

关键词：

Cerrado; Gramineae; Mesosetum sect. Bifaria; Panicoideae; taxonomy; PANICEAE; PANICOIDEAE; SCLEROCHLAMYS;

D O I：

10.11646/phytotaxa.404.4.4

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A new species of Mesosetum with a winged rachis, only known from Serra da Canastra, Minas Gerais, Brazil, is described and illustrated. The new species (Mesosetum canastrense) is morphologically similar to M. alatum, but it is distinguished mainly by the collar with a continuous line of trichomes (vs. absent or interrupted in M. alatum), synflorescences 6-9(-12) cm long (vs. 2.2-3.2(-7.5) cm long), pedicels with a truncate apex (vs. oblique), spikelets with the base surrounded by long appressed trichomes 0.8-1.2 mm long (vs. glabrous or with short sparse trichomes ca. 0.2 mm long) and with an inconspicuous callus (vs. conspicuous and geniculate), and the lower anthecium neuter (vs. staminate or neuter). Additionally, the two species also differ in geographical distribution, since M. alatum only occurs in the Brazilian state of Mato Grosso.

引用

页码：155 / 162

页数：8

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