STANDLEY—ALLIONIACEAE OF THE UNITED STATES. 351 
This is very closely related to A. floribunda and perhaps hardly separable 
from it. Doctor Heimer! confused another and different plant with the tvpe of 
Doctor Gray’s variety. 
Specimens eraminced: 
Texas: 1849, Wright G04, type collection: Houston, 1842, Lindheimer. 
29. Allionia pratensis Standley, sp. noy. 
Root perennial, long and slender; stems much branched from near the base, 
sparingly dichotomous above, erect or ascending, about 40 cm. high, more or 
less densely subhispid or subpilose throughout, the uppermost branches densely 
so, the hairs more scattered below; leaf blades deltoid-ovate to broadly lanceo- 
late, 4.5 cm. long, 8 cm. wide or less, obtuse or the uppermost acute, the lower 
ones glabrous, the upper more or less pubescent; petioles as long as the blades 
or longer, the uppermost blades sessile; inflorescence cymose, rather dense, its 
branches densely puberulent; involucres on pedicels 10 nim. long or less, about 
9mm. wide and 7 mim. high or less, the lobes elliptical or ovate, obtuse or acutish, 
densely covered with rather long, soft, pale hairs, the free portion as long as 
the tube or longer; perianth about 12 mm. long and 17 mm. wide, rose-purple; 
stamens 5, exserted: fruit 4 mm. long, obtuse, 5-ribbed, the ribs low and almost 
smooth, the spaces between them smooth and minutely hispidulous. 
Although rather closely related to A. melanotricha, this plant seems amply dis- 
tinct. Its flowers are broader, the stamens more numerous, the pubescence much 
more abundant, the petioles longer, the leaves broader and more numerous, the 
plant lower and lacking the black hairs found upon the involucres of the latter 
species. Type in the herbarium of the New Mexico Agricultural College, col- 
lected at Barfoot Park, in the Chiracahua Mountains, Arizona, L907, Blumer 
1384. 
30. Allionia melanotricha Standley, sp. nov. 
Owrybaphus nyctagineus cervantesiti A. Gray, Bot. Mex. Bound. 174. 1859, 
in part at least: not O. cervantesii Lag. 
Stems erect, abundantly dichotomous-branched, about GO cm. high, glab- 
rous except the branches of the inflorescence, these rather closely covered 
with moderately stiff, rather spreading viscid pubescence; leaf blades lance- 
olate, 8 cm. long and 38 em. wide or less, bright yellowish-green, attenuate 
at the apex, broadly cuneate or rounded at the base, glabrous except the 
sparingly ciliolate margins; petioles one-half as long as the blades or shorter, 
those of the uppermost leaves very short; inflorescence cCymose; involucres 
numerous on short, densely pubescent pedicels, not more than S mim. broad 
and 6 mm. high, densely covered with short, soft hairs, these light-colored 
along the margins of the lobes but black elsewhere, the lobes oblong, rounded , 
at the apex, twice as long as the tube; flowers about 16 mm. long and 12 mim. 
wide, bright rose-purple; stamens 8, exserted; fruit about 3 mm. long, with 
+ or 5 narrow, tuberculate ribs, the smooth surfaces between them sparingly 
puberulent. 
Docter Heimer] in his notes which are attached to the sheets in the National 
Werbarium has called this A. oblongifolia, but the specimens of the type 
collection of that species in the National Herbarium «and the Missouri Botanical 
Garden are of very different plants. The two differ in the form of the leaves, 
in their pubescence and their inflorescence, and in the size of their involucres, 
This is the plant called by Doctor Gray O.rybaphus nyctagineus cervantesii, but 
it is different from A. cervantesii and certainly not very closely related to A, 
nyctaginea, Type in the herbarium of the New Mexico Agricultural College, 
