to U.hirtiflora, it possesses a number of characters which 
indicate arelationship with U.spectabilis and U. Watsonii 
as well. U.flavida resembles both the Guatemalan species 
in having a 4-dentate calyx. A corresponding resemblance 
is to be found in the glandular-lepidote staminodium of 
U. flavida, U. spectabilis and U. Watsonii, as opposed to 
the glabrous staminodium of U./irtiflora. 
An evaluation of the important characters of Uroskin- 
nera flavida indicates that this species, which is geo- 
graphically intermediate between the Oaxacan and the 
Guatemalan species, is also taxonomically intermediate 
between U.hirtiflora on the one hand, and U.spectabilis 
and U. Watsonu on the other. A closer affinity exists 
between UU. flavida and the Oaxacan U. hirtiflora, than 
between U.flavida and the Guatemalan species, U.spec- 
tabilis and U. Watson. 
Uroskinnera hirtiflora Hems/ey Diagn. P|. Nov. 
... Mex. et Centr.- Am., pt. 2 (1879) 34—Hemsley 
in Godman & Salvin Biol. Centr.-Am., Bot. 2 (1881-82) 
447—ibid 5(1882) t.64—Conzatti & Smith FI. Sin. Mex., 
ed. 2 (1910) 150, 161. 
Zapotec name: yet-le 
On the basis of the four collections cited below, and the 
field notes which accompany them, the following am- 
plified description of Uroskinnera hirtiflora is presented. 
A stout shrub 6-8 feet in height. Leaves long-petiolate, 
oblong-elliptic or ovate-elliptic, serrate, rather obtuse at 
the apex, rounded or slightly cordate at the base, thick- 
chartaceous, velvety villous-sericeous above and below, 
7-12 cm. long, 4.5—-7.5 em. wide (the members of a pair 
often unequal), yellow-green above, grey-green below. 
Petioles densely villous-hirsute, 1.5-5 (usually 4-5) em. 
long. Inflorescence a long, dense, many-flowered raceme. 
od 
Pedicels up to 5 mm. long, but usually much shorter, 
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