156 F. Fedde und K. Schuster: Index novorum Siphonogamorum. [156 



Piptadenia confine Standl. 1. c. p. 191. Mexico (J. N. Rose n. 16339): 



Baja California Xantus n. 33. Palmer n. 548. 86. Rose n. 16444. 16837. 

 16896. Nelson et Goldman n. 7316). 

 P. tortum Mart. f. scalare (Gris.) Hassler in Fedde. Rep. XVI (1919) p. 155 

 (= P. scalare Griseb.)- — Paraguay (Hassler n. 1069. 1070. 7527 etc.); 

 Gran Chaco (Rojas n. 277. Hassler n. 2399). 

 P. turgidum Merr. in Philipp. Journ. Sei. XV (1919) Bot. p. 239. — Kwangtung 



(Levine et Graff n. 86, Levine n. 1976). 



Prosopis Algarobilla Gris. var. Nandubay (Lor. pro spec.) Hassler in Fedde. 



Rep. XVI (1919) p. 154. -- Paraguay (Hassler n. 1040a, b, Rojas n. 1531): 



Gran Chaco (Hassler n. 2483. Rojas n. 707). 



P. cineraria (L.) Maebr. in Contrib. Gray Herb. Harv. Univ., N. S. LIX (1919) 



p. 16 ( = Mimosa cineraria L. = Prosopis spicigera L. = P. spicata Burm.). 



P. fareta (Russell) Macbr. 1. c. p. 17 (= Mimosa fareta Russell = M. Stephaniana 



Bieb. = Prosopis Stephaniana [Bieb.] Kunth). 

 Psoralea americana L. var. villosa (Guss.) Thell. in Viertel] ahrsschr. Naturf. 

 Ges. Zürich LXIV (1919) p. 759 (== P. polystaehya Poir. == P. americana 

 ß. polystaehya Fiori et Paol. = P. dentata ß. DC. == P. americana ß. Lowe 

 = P. dentata var. villosa Guss. = P. alnifolia BertoL). - - Schweiz. 

 P. fruticans (L.) Rydb. in North Amer. Flora XXIV, Pt. 1 (1919) p. 2 (= Tri- 

 folium fruticans L. = Psoralea bracteata L. = P. fruticosa Kellogg = Lo- 

 todes fruticans Ktze.). — Cap of Good Hope, California. 

 Psoralidium Rydb. gen. nov. in North Amer. Flora XXIV (1919) p. 12. 



Perennial herb, with rootstocks. Leaves alternate, glandular-dotted, 

 digitately 3 — 5-foliolate. Flowers in long-peduneled interrupted spikes 

 or racemes, bearing 1 — 4 flowers at each node. Calyx campanulate, with 

 a sbort tube, 5-lobed, the lowest lobe usually somewhat longer than the 

 rest. Corolla blue or purple, sometimes whitish, with purple-tipped 

 keel; banner rounded-obovate to nearly orbicular, usually with narrow 

 lobes at the base of blade and a short narrow straight claw; blades of the 

 wings and keel-petals united below, obliquely oblanceolate, oblong, or 

 obovate. rounded at the apex, each with a small basal lobe, those of the 

 wings twice as long as their claws and as long as the blades of the keel- 

 petals. Staminal tube as in Orbexilum. Tenth stamen usually free to 

 near the base. Style bent above; stigma capitate. Pod from orbicular 

 to oblong-ovate, somewhat compressed, glandular-dotted but not wrinkled, 

 with a short straight beak; pericarp coriaeeous, not attached to the seed. — 

 Type species: Psoralea tenuiflora Pursh. 

 P. lanceolatum (Pursh) Rydb. 1. c, p. 13 (== Psoralea lanceolata Pursh = = P. 

 elliptica Pursh = = P. arenaria Nutt. = P. laxiflora Nutt. = ! P. scabra 

 Nutt, = Lotodes ellipticum Ktze. = L. ellipticum var. angustissimum 

 Ktze.). — Montana, Missouri, Albert a. Arizona. 

 P. micranthum (A. Gray) Rydb. 1. c. p. 13 (= Psoralea micrantha A. Gray 

 = Lotodes micranthum Ktze.). — Oklahoma, Southern Utah, Arizona, 

 Texas. 

 P. Purshii (Vau) Rydb. 1. c, p. 14 (= Lotodes ellipticum var. latifolium Ktze. 

 = Psoralea Purshii Vau = P. lanceolata var. Purshii Piper = P. lanceo- 

 lata var. scabra Piper). — Nevada. 

 P. stenostaehys Rydb. 1. c. p. 14 (= Psoralea stenostaehys Rydb.). • Utah. 

 P. stenophyllum Rydb. 1. c. p. 14 (= Psoralea stenophylla Rydb.). ■ Utah, 



