Part 1, 1919] FABACEAE: PSORALEAE 51 



I. Delicatae. Slender annuals. Leaflets numerous, small, retuse. Racemes slender, lax. 

 Flowers pedieelled, reflexed; bracts broadly obovate, short-acuminate, caducous. Calyx 

 strongly 10-ribbed, pubescent on the ribs; lobes serrate. Banner very small. Wings and keel- 

 petals inserted below the middle of the staminal tube. 



1. Parosela delicata Rose, Contr. U. S. Nat. Herb. 8: 304. 

 1905. 



Marina gracilis Liebm. Vidensk. Meddel. 1853: 103. 1854. Not Parosela gracilis (Kunth) Rose, 



1906. 

 Dalca delicata Greemnan, Field Mus. Publ. Bot. 2: 331. 1912. 



A slender annual; stem branched, 2-4 dm. high, glabrous, glandular-punctate; leaves 

 delicate, 2-3 cm. long, ascending; stipules minute, subulate; petioles 1-3 mm. long; rachis 

 slightly margined, glabrous; stipels minute; leaflets 15-31, about 2 mm. long, oblong-cuneate, 

 retuse, glabrous, punctate along the margins and on the lower surface; peduncles slender, 2-3 

 cm. long; racemes lax, 1-2 cm. long, 3-9-flowered; pedicels about 1 mm. long; calyx-tube tur- 

 binate, strongly 10-ribbed, sparingly silky on the ribs, 2.5 mm. long; lobes ovate, equaling the 

 tube, short-acuminate, serrulate on the margins; corolla purplish; blade of the banner 1—1.5 

 mm. long, and a little broader, suborbicular, slightly shorter than the claw; blades of the wings 

 and keel-petals 4.5-5 mm. long, the claws 1.5 mm. long; pod broadly obliquely obovate, shorter 

 than the calyx, sparingly pubescent, with a short erect beak. 



Type locality: Iguala, Guerrero. 

 Distribution: Guerrero. 



II. Chrysorhizae. Annuals or perennials. Leaflets usually numerous. Racemes various. 

 Calyx rather strongly ribbed, pubescent without; lobes mostly ovate, not longer than the 

 tube. Corolla purple. Blade of the banner cordate or reniform. Wings and keel-petals 

 inserted below the middle of the staminal tube, sometimes near its base; blades of the keel- 

 petals only slightly larger than those of the wings. 



2. Parosela spiciformis Rose, Contr. U. S. Nat. Herb. 8: 303. 



1905. 



A branched annual; stem 2-3 dm. high, glabrous up to the inflorescence, purplish; leaves 

 many, glabrous, 3-5 cm. long; stipules subulate, about 5 mm. long; petioles 5-8 mm. long; 

 leaflets 5-9, glabrous, elliptic or oval, or the terminal one obovate, 6-15 mm. long, sinuately 

 crenulate, with a gland in each sinus, and minutely glandular-punctate beneath; peduncles ter- 

 minating the branches, 1-4 cm. long, crisp-hairy and distinctly glandular-dotted; racemes dense, 

 spike-like, 2-3 cm. long; bracts lanceolate, acuminate, 3-4 mm. long, with a few glands; pedi- 

 cels very short; calyx-tube turbinate, strongly 10-ribbed, sparingly crisp-hairy; lobes ovate- 

 lanceolate, green and purple-tipped, about as long as the tube, obtuse, except the lowest one, 

 which is slightly longer and acute; corolla dark-purple; blade of the banner suborbicular, 2 mm. 

 long, the claw about 1 mm. long; wings and keel-petals inserted slightly below the middle of 

 the staminal tube, the blades about 3 mm. long; pod included in the calyx. 



Type locality: Iguala, Guerrero. 

 Distribution: Guerrero. 



3. Parosela neglecta (B. L. Robinson) Rose, Contr. U. S. Nat. 



Herb. 8: 304. 1905. 



Dalea neglecta B. L. Robinson, Proc. Am. Acad. 29: 329. 1894. 



A perennial, shrubby at the base, 3-5 dm. high; branches ascending, glabrous, glandular- 

 punctate; leaves 3-5 cm. long, ascending; stipules minute, subulate; petioles about 1 cm. long, 

 glandular-punctate and with gland-like pointed stipels; leaflets 11-15, elliptic or oblanceolate, 

 7-10 mm. long, obscurely crenate, rounded at the apex, acute at the base, glabrous above, 

 glaucous and glandular-punctate beneath; petiolules 0.5 mm. long; peduncles 3-4 cm. long; 

 racemes lax, 2-4 cm. long; rachis puberulent; bracts lanceolate, acuminate, caducous; calyx 



