104 Contributions from the Gray Herbarium 



Wings oval-obovate, rounded at apex, cuneate at base, glabrous, 

 3-nerved, 1.4 nun. long, 0.8 mm. wide. Keel glabrous, 1.7 mm. 

 long; crest of about 3 pairs of lobes. Upper petals oblong, rounded 

 at apex, 1.5 mm. long. Capsule narrowly oblong, curved, rounded 

 at each end, 3.6 mm. long, 1.3 mm. wide, the upper cell larger, dis- 

 tinctly winged, the lower wingless, indehiscent. Seed cylindric, 

 curved, black, finely pilosulous, 2.5 mm. long. Aril 1.7 mm. long, 

 the corneous umbo minute, the 2 scarious lateral lobes appressed. 

 Wats.! Proc. Am. Acad. xvii. 326 (1882); Chod. Monog. ii. 286. 

 t. 26. f. 10-11 (1893). Nuevo Leon: Monterey, Feb. 1880, 

 Palmer 67 (type coll.: GK). T. 2. Fig. 79. 



127. P. hemipterocarpa Gray. Stems several, sparsely 

 branched, erect from a fruticulose base, sulcate, very glabrous and 

 slightly glaucous, 1.2-5.6 dm. high. Leaves linear, acute or sub- 

 acuminate, mucronate, obtuse at base, thickish, flattish above, be- 

 neath convex, 1-nerved, scarcely sulcate, glabrous, 6-23 mm. long, 

 0.6-1 mm. wide, on petioles 0.5 mm. long or less. Racemes 3-21 

 cm. long, many-flowered. Flowers white, greenish-veined, 3.5-4 

 mm. long. Upper sepal oval, the lower ovate, all obtuse, 1.6- 

 (upper) 2.3 mm. long. Wings obovate, rounded at apex, 5-nerved, 

 glabrous, 3.5-4 mm. long, 1.6-1.8 mm. wide. Keel 3.4 mm. long; 

 crest of about 3 pairs of 2^-lobed processes. Upper petals oblong, 

 rounded at apex, 3.1 mm. long. Capsule oblong, 5 mm. long, 2.3 

 mm. wide, the upper cell longer, broadly erose-scarious- winged, the 

 lower wingless, filled by the seed. Seed short-silky-pilosulous, 2.7 

 mm. long. Aril (of seed in winged cell) 2 mm. long, the scarious 

 lobes linear, appressed; of seed in wingless cell obsolescent. P. 

 (Monninopsis) hemipterocarpa Gray! PI. Wright, ii. 31 (1853) ; Chod. 

 Monog. ii. 281. t. 26. f. 1-2 (1893) ; Rob. in Gray, Syn. Fl. i. pt. 1. 

 453 (1897). Chihuahua: near Colonia Garcia, Sierra Madre, 

 2285 m., 16 June 1899, Townsend & Barber 37 (BGK). Also in 

 Texas, Arizona, and New Mexico. 



128. P. macroloncha Chod. Stems slender, striate, green, 

 glabrous, denudate below, leafy above, from a suffruticulose base. 

 Leaves linear-acicular, erect, acute at each end, glabrous, 9-10 mm. 

 long, 1-1.5 mm. wide or smaller. Racemes terminal, scarcely 

 loosely flowered, 1.5-2 cm. long, 7 mm. thick; bracts quickly 

 caducous, the middle one acicular, 1.3 mm. long; pedicels 0.5 mm. 

 long. Flowers white, 4.5 mm. long. Upper sepal ovate, shortly 



