NORTH AMERICAN FLORA [Volume 24 



Leaflets broadly oval. 4. H . brachycalyx. 



Leaflets oblong to lanceolate. 5. //. Ehrenbergii. 



1. Hesperothamnus littoralis Brand. Univ. Calif. Publ. Bot. 6: 

 499. 1919. 



Lonchocarpus littoralis Brand. Zoe 5: 157. 1903. 

 Coursetia littoralis Brand. MS. 



A spreading shrub, about 2 m. high; branches subvelutinous; leaves 1.5 dm. long; rachis 

 subvelutinous; stipels subulate, 1 mm. long; leaflets 5, broadly ovate, 2.5-7 cm. long, 1.5-5 cm. 

 wide, sparingly hairy but soon glabra te above, more densely short-villous beneath, strongly 

 veined, rounded at the base, acute to retuse and mucronate at the apex; racemes about 1 dm. 

 long; peduncle subvelutinous; calyx densely pubescent, the. tube 3 mm. high and broad, the 

 lobes deltoid-lanceolate, acuminate, 3 mm. long; corolla purple or sometimes white; petals 

 subequal in length, about 12 mm. long; banner with an orbicular blade and short claw; wings 

 obliquely oblanceolate, with a prominent acute basal auricle; keel-petals broader, obliquely 

 obovate, with a rounded basal auricle; alternating stamens somewhat shorter; ovary 4-ovuled; 

 pod 5—7 cm. long, about 1.5-2 cm. wide, velutinous, somewhat torulose, usually 2-3-seeded, 

 tapering at each end. 



Type locality: Cape Region, Lower California. 

 Distribution; Type locality and vicinity. 

 Illustration: Am. Jour. Bot. 11: pi. 35 W. 



2. Hesperothamnus Purpusi (Harms) Rydberg. 



Selerothamnus Purpusi Harms, Repert. Sp. Nov. 17: 326. 1921. 

 Hesperothamnus grandis Standley, Contr. U. S. Nat. Herb. 23: 484. 1922. 



A shrub, 3-6 m. high; bark of the older branches dark-gray; young branches subvelutinous, 

 with short spreading hairs; leaves 8-20 cm. long; stipules caducous; rachis subvelutinous; 

 stipels subulate-filiform, about 2 mm. long; leaflets 5, oval or the terminal one obovate, usually 

 more or less abruptly short-acuminate, 4-9 cm. long, 2-6 cm. wide, subcoriaceous, strongly 

 veined, glabrate above, subvelutinous beneath, especially on the veins; racemes 9-15 cm. long; 

 flowers 2-5 at each node; bracts narrowly linear, 3-4 mm. long; calyx subvelutinous, the tube 

 nearly 4 mm. long, the lobes lanceolate, acute, 2-3 mm. long; corolla pinkish, 10-12 mm. 

 long; banner rounded-obovate, pubescent without, the claw about half as long as the blade; 

 blades of the wings oblong, falcate, obtuse, twice as long as the claw; those of the keel-petals 

 obliquely-obovate, with a rounded basal auricle; pod about 5 cm. long, 6-7 mm. wide, sub- 

 velutinous. 



Type locality: El Riejo, Puebla. 

 Distribution: Puebla and Oaxaca. 



3. Hesperothamnus pentaphyllus (Harms) Rydberg. 



Selerothamnus pentaphyllus Harms, Repert. Sp. Nov. 17: 325. 1921. 



A shrub, 5-8 m. high; bark of the stem gray; young branches finely subvelutinous; stipules 

 caducous; leaves 1-1.5 dm. long; rachis subvelutinous; stipules filiform, about 4 mm. long; 

 leaflets 5, strongly veined, oval or the terminal one obovate, 3-7 cm. long, 1.5-5 cm. wide, acute, 

 or the terminal one obtuse or rounded at the apex, or rarely short-acuminate, glabrous above, 

 silky-strigose with short appressed hairs beneath; racemes 10-15 cm. long; flowers 2-3 at each 

 node; calyx silky-strigose, the tube 3-4 mm. long, the lobes lanceolate, acuminate, 4 mm. long; 

 corolla 15 mm. long, similar to that of the preceding species, but the wings broader; pod about 

 6 cm. long and 8 mm. wide, 3-4-seeded, silky-strigose, with yellowish hairs. 



