120 NORTH AMERICAN FLORA [Volume 24 



10-ribbed, with a row of small glands in the intervals; lobes lance-subulate, pilose, about 

 equaling the tube; corolla rose-purple; blade of the banner rhombic-ovate, 1.5 mm. long, the 

 claw 2.5 mm. long; blades of the other petals obliquely oval or elliptic, 2 mm. long, with a 

 short claw, scarcely 0.5 mm. long; pod densely pilose, glandular-dotted. 



Type locality: Santa Catalina Mountains, southern Arizona. 



Distribution: Arizona, Sonora, and Chihuahua. 



10. Thornbera Nelsonii (Rose) Rydberg, sp. nov. 



Dalea Nelsonii Rose, MS., in herb. 



A herbaceous perennial; stem about 5 dm. high, purplish, glabrous; leaves ascending, 

 3-4 cm. long; stipules filiform, 3 mm. long; rachis glabrous; stipels gland-like; leaflets 17-33, 

 oblong, about 5 mm. long, glabrous on both sides, glandular-dotted beneath; peduncles 5-12 

 cm. long; spikes 4-10 cm. long, 7 mm. thick; bracts lance-subulate, long-attenuate, pilose and 

 glandular-dotted, longer than the calyx; calyx-tube campanulate, 2 mm. long, more deeply 

 cleft above, obscurely 10-ribbed, with numerous scattered glands; lobes triangular, acute, 1 

 mm. long, ciliate; corolla bluish-purple; blade of the banner rounded-ovate, with acutish basal 

 lobes, 3.5 mm. long, the claw 2 mm. long; blades of the other petals elliptic, somewhat oblique 

 at the base, 3 mm. long, the claws very short; pod glabrous, minutely glandular. 



Type collected sixty miles south of Guadalupe y Calvo, Chihuahua, August, 1898, E. W. Nelson 

 4790 (U. S. Nat. Herb. no. 332840). 



11. Thornbera pumila Rydberg, sp. nov. 



A low annual; stem branched from near the base, 1-3 dm. high, angled, glabrous and 

 slightly glandular-dotted; leaves about 2 cm. long; stipules subulate, 1-2 mm. long; rachis 

 glabrous, slightly margined; leaflets 7-9, linear-oblong or oblanceolate, 5-10 mm. long, glabrous 

 on both sides, finely glandular-dotted beneath; peduncles terminating the branches, about 



1 cm. long; spikes very dense, short, 1-2.5 cm. long, 6-8 mm. thick; bracts broadly obovate, 

 abruptly short-acuminate, dark, with conspicuous straw-colored margins, densely glandular- 

 dotted on the backs, ciliate on the margins; calyx-tube campanulate, 2 mm. long, densely 

 silky; lobes subulate, equaling the tube, silky-plumose; banner white, the blade broadly oval, 



2 mm. long, the claw 3 mm. long; other petals blue, oblong, 3 mm. long, with very short claws; 

 pod densely pubescent above, glabrous at the base. 



Type collected at Culiacan, Sinaloa, October 5, 1904, T. S. Brandegee (U. S. Nat. Herb. no. 

 571945). 



Distribution: Sinaloa. 



12. Thornbera Dalea (L.) Rydberg. 



Psoralea Dalea L. Sp. PI. 764. 1753. 



Psoralea annua Mill. Card. Diet. ed. 8. Psoralea no. 6. 1768. 



Dalea Clifforliana Willd. Sp. PI. 3: 1336. 1803. 



Dalea Linnaei Michx. Fl. Bor. Am. 2: 57, in part. 1803. 



Amorpha glandulosa Blanco, Fl. Filip. 555. 1837.* 



Dalea nigra Mart. & Gal. Bull. Acad. Brux. 10 2 : 43. 1843. 



Dalea alopecuroides Blanco, Fl. Filip. ed. 2. 389. 1845. Not D. alopecuroides Willd. 1803. 



Dalea annua Kuntze, Rev. Gen. 178. 1891. 



Dalea annua Clifforliana Kuntze, Rev. Gen. 178. 1891. 



Dalea Dalea MacM. Metasp. Minn. Valley 330. 1892. 



Dalea glandulosa Merrill, Philip. Gov. Lab. Bur. Bull. 27: 37. 1905. 



Parosela nigra Rose, Contr. U. S. Nat. Herb. 10: 105. 1906. 



Parosela Clifforliana Rose, Contr. U. S. Nat. Herb. 10: 105. 1906. 



An annual; stem much branched, 2-8 dm. high, angled, glabrous, rather copiously glandu- 

 lar-dotted; leaves 2-4 cm. long; stipules subulate, 3 mm. long; rachis glabrous, wing-margined, 

 copiously glandular-dotted; leaflets 7-15, oblong-oblanceolate, 5-10 mm. long, glabrous on 

 both sides, conspicuously glandular-dotted beneath; peduncles about 1 cm., long, terminating 

 the brandies; spikes very dense, 1-3 cm. long, 8 mm. thick; bracts rhombic-lanceolate, acumi- 

 nate, blackish, conspicuously glandular-dotted, puberulent or glabrate on the back, ciliate on 

 the margins; calyx-tube nearly 2 mm. long, campanulate, with 10 dark ribs, with a row of 

 glands in the intervals, silky; lobes lance-subulate, fully as long as the tube, silky-plumose; 



* The Philippine plant is usually somewhat more slender than the Mexican. 



