28 Contributions from the Gray Herbarium 



cently pubescent %\ i 1 1 1 spreading-incurved hairs. Leaves from oval 

 below t<> oblong or obovate-oblong, obtuse or truncate a1 the mu- 

 cronate apex, cuneate al base, 3-nerved, thick, more or less densely 

 pubescent with Bpreading-incurved hairs, the lower 11 nun. long, 



1 5.3 mm. wide, the middle and upper 15-16 mm. long, 4.5-7 mm. 

 wide, on petioles 0.6 nun. long, or subsessile. Racemes 3.5-4.5 cm. 

 long, somewhat flexuose, densely canescently pubescent with 

 spreading-incurved hairs, 6-11 -flowered. Flowers 5.7-6 mm. long, 

 " pale greenish yellow." Sepals lanceolate, acuminate, pubescent 

 like the leaves, 2.8 mm. long. Wings obovate, acutish, pubescent 

 Dearly all over with spreading-incurved hairs, 5.7-6 mm. long, 2.8 

 mm. wide. Keel glabrous, equalling the wings. Upper petals with 

 cuneate-obovate somewhat erose apex, " purplish," 4.5 mm. long. 

 ( lapsule elliptic-ovate, somewhat narrowed above, rounded at base, 

 glabrous except for the subspreading-ciliolate margin, 10 mm. 

 long, 7.5 mm. wide, on a stipe 1 mm. long. Seed 6 mm. long, sub- 

 sparsely pilose. Aril 1.5 mm. deep, with spreading-pilose umbo and 

 much narrower subentire scarious margin extended into short an- 

 terior and dorsal subhorizontal lobes. Wats.! Proc. Am. Acad, 

 xvii. 325 (1882). Coahuila: Juarez, 160 km. north of Monclova, 

 Sept. 1880, Palmer (type: G). T. 1. Fig. 15. Omitted from 

 Chodat's revision. 



29. P. racemosa, sp. nov. Pluricaulis e basi fruticulosa, cauli- 

 l>us ramosis vel subsimplicibus adscendentibus 2.5-3.5 dm. altis 

 dense incurvo-puberulis sed viridibus. Folia media et superiora 

 linearia acuta mucronulata saepius plus minusve involuta incurvo- 

 puberula 1.5-3.1 cm. longa 1.5-3 mm. lata, inferiora similia sed 

 valde reducta. Racemi caules et ramos terminantes recti vel plus 

 minusve flexuosi 16-21-flori 7-13 cm. longi. Flores 4.5-4.8 mm. 

 longi ut videtur viridescentes. Sepala lanceolata subacuminata 

 patenter incurvo-pilosula 2-2.3 mm. longa. Alae ovali-obovatae 

 apice rotundatae supra et costam secundum infra subdense puberu- 

 lae pilis patenti-incurvis et ciliolatae 4.5 mm. longae 2.9 mm. latae. 

 Carina alas subaequans. Capsula elliptica basi rotundata substi- 

 pata in margine ciliolata ceterum glaberrima 7-9.5 mm. longa 

 5.8-7 mm. lata. Semen breviter pilosum 4.5 mm. longum. Arillus 

 parvus 0.7-1 mm. altus, margine scarioso angusto subintegro lobis 

 lateralibus subnullis dorsali brevissimo. Chihuahua: Santa 



