ROSE—MEXICAN AND CENTRAL AMERICAN PLANTS. 293 
American species may possibly be referred to O. knowltoni is not borne out by the 
specimens. 
Ostrya baileyi Rose, sp. nov. 
Tree 12 meters high with trank 15 em. in diameter; bark of twigs one or two years 
old dark grayish brown, those of the current season brown and pubescent with both 
glandular and simple hairs; petioles 2 to 5 mm. long, with pubescence like that of 
young branches; blade oblong, 4+ to 6 cm. long, distinctly cordate at base, obtuse or 
acutish at apex, somewhat doubly and sharply serrate, pale beneath but not shining, 
somewhat softly pubescent on both surfaces; scales subtending the stamens acute. 
Collected by Vernon Bailey in Guadalupe Mountains, Texas, August 19, 1901 
(no. 435). 
This species differs from Ostrya rirginiana in the shape and toothing of the leaves, 
the more glandular branches and petioles, different tips to bracts of male flowers, ete. 
From 0. knowltoni in the color of the bark of the one and two year old branches, the 
cordate base of the leaf blades, the thickly set stipitate glands on branches and 
petioles, the sharper teeth of the leaves, ete. 
This species is somewhat intermediate in characters between O. rirginiana and 
QO. knowltoni and also occupies an intermediate geographical position. 0. virginiana’s 
western limit is eastern Texas, while O. knowltons comes only from the Grand Canyon 
region of Arizona. 
Mr. Bailey furnishes me the following statement regarding his 
specimens: 
The tree from which the type specimen was taken stands in the head of Dog Canyon 
on the west slope of the Guadalupe Mountains, Texas, about 2 miles south of the 
Texas and New Mexico line at approximately 2,160 meters altitude. It is in the 
lower end of the gulch half a mile east of the spring where the wagon road ends. 
Other trees of the species are fairly common in the shaded gulches of Dog and Mekit- 
terick canyons at from 2,100 to 2,550 meters altitude in transition zone, in company 
with yellow pines, Douglas spruce, oaks, and a maple. 
BRASSICACEAE. 
A NEW GENUS, ORNITHOCARPA. 
Ornithocarpa gen. noy. Puate LXIV. 
Calyx rather long-cylindrical in bud; sepals narrowly oblong, obtuse, in anthesis 
spreading, purplish. Petals oblong, the upper part of margin fimbriate, the lower 
part lacerate or toothed, broad at base, white. Filaments filiform, elongated; 
anthers linear, oblong. Style much longer than the ovary, rigid, filiform, apiculate 
at apex; stigma minute, terminal. Ovary shortly stipitate, flattened parallel with 
the broad partition, 2-celled, each cell 2-ovuled. Ovules attached at the margin 
near the middle, Fruit obliquely ovate, the lower edge slightly rounded, the upper 
strongly so, indehiscent, wingless, crustaceous, tipped by a long beak-like persistent 
stvle; seed 1 (the other 3 ovules abortive). Cotyledons broad, accumbent. 
Ornithocarpa fimbriata Rose sp. nov. 
Stems simple or nearly so, 60 to 90 em. high; racemes 10 to 80 em, long; leaflets 
strongly toothed or cleft; style 6 mm. long; ovary and fruit glabrous. 
An annual, glabrous, growing in shallow water. Leaves pinnate. Inflorescence 
an elongated raceme. 
Collected by C. G. Pringle at Constancia Station, east of Guadalajara, Jalisco, 
August 19, 1902 (no. 8654). 
EXPLANATION OF PLATE LXIV.—Fig. a, upper part of stem; }, sepal; ec, petal, d, two views of 
stamen; e, ovary and disk, /. pod, g, seetion of pod showing ovules and seed, &, cross section of 
pod, 7,seed with covering removed, showing cotyledons, Fig. a, natural size; b toe, scale 4. f. g, and 
h, seale 2, 7, scale 4. 
