620 FABACEAE 



1. Xylophacos Missourie"nsis (Nutt. ) Kydb. Plant silky-strigillose with silvery 

 hairs. Stems mostly tufted, often 1-iO cm. long : leaves approximate, mostly 5-15 cm. 

 long ; stipules ovate-lanceolate, acute ; leaflets 7-21, the blades elliptic, oval to obovate, 

 6-10 mm. long, acute or obtuse and mucronate : racemes few-flowered, 1-7 cm. long : 

 peduncles 5-20 cm. long : pedicels 2-3 mm. long : calyx mostly 9-10 mm. long ; lobes 

 about as long as the tube : corolla violet-purple, 2 cm. long or slightly shorter : pods 

 about 2.5 cm. long, acuminate, transversely wrinkled, dehiscent, slightly keeled along the 

 ventral suture. [Astragalus Missouriensis Nutt.] 



On prairies and plains, Northwest Territory to Nebraska, Texas and New Mexico. Spring and 

 summer. 



27. DALBERGIA L. f. 



Shrubs, with upright or climbing branched stems. Leaves alternate : blades 1-folio- 

 late or rarely unequally pinnate : leaflets often leathery. Flowers perfect, in small racemes 

 or panicles, or cyme-like axillary clusters. Calyx pedicelled : lobes disposed in 2 lips, the 

 2 upper relatively broad, the 3 lower relatively narrow. Corolla white : standard with a 

 broad blade: wings about as broad as the slightly incurved keel-petals. Stamens 8-10, 

 monadelphous or diadelphous. Anthers erect : sacs opening by cracks at the apex. Ovary 

 stalked. Style almost straight. Ovules 2 or sometimes solitary. Pod flat, suborbicular, 

 indehiscent. Seed solitary. 



1. Dalbergia Brdwnei (Pers. ) Kuntze. A shrub 1-5 m. tall, with long wide-spread- 

 ing branches. Leaves 1-foliolate, attenuate ; leaflets leathery, the blades 5-15 cm. long, 

 ovate, oblong or elliptic, short-acuminate, minutely pubescent beneath, rounded or trun- 

 cate at the base ; petiolule as long as the petiole or shorter : panicles 1-2 cm. long, in the 

 axils: pedicels 1-3 mm. long : calyx campanulate, 1.5-2 mm. long ; lobes shorter than the 

 tube : corolla white or pink, 7-9 mm. long : pods suborbicular, 2-3 cm. in diameter, 1- 

 seeded, reticulated. 



On river banks and shores, southern Florida and tropical America. 



28. ICHTHYOMENTHIA P. Br. 



Tropical trees, with a reddish brown scaly bark and stout branches. Leaves alternate 

 without stipules : blades unequally pinnate : leaflets opposite, leathery, thickened at the 

 margins, on slightly swollen petiolules. Flowers perfect, in large axillary thyrsoid panicles 

 arising from the branches of the previous year. Calyx pedicelled : tube campanulate, per- 

 sistent : lobes 5. Corolla white tinged with red, standard with a suborbicular, emarginate 

 blade, canescent on the outer surface, with a green blotch on the inner ; claw almost as 

 long as the calyx : wings oblong-spatulate, auricled on the upper side : keel-petals broadly 

 falcate ; claws connate. Stamens 10 : filaments diadelphous (9 and 1) : anthers versatile- 

 uniform in size. Ovary linear, sessile, silky. Style subulate, incurved. Stigma capitate. 

 Ovules numerous, pendulous, amphitropous. Pod linear, flattened, on a stalk which ex- 

 ceeds the calyx-tube, more or less constricted between the seeds, indehiscent, furnished 

 with 4 broad wings, 2 to each suture. Seeds flattened, with a dull crustaceous testa. 



2. Ichthyomeiitbia piscipula (L. ) A. S. Hitchcock. An irregularly branched tree, 

 sometimes 17 m. tall, with pubescent young foliage. Leaves pinnate, 1-3 dm. long ; leaf- 

 lets 7-9, the blades oblong varying to oval, obovate or rarely ovate, 2-10 cm. long, ab- 

 ruptly acute or acuminate, undulate or shallowly toothed ; petiolules 4-7 mm. long : 

 panicles 1-1.5 dm. long, short-peduncled : pedicels 5-10 mm. long : calyx campanulate ; 

 tube silky ; lobes broadly triangular, shorter than the tube : corolla white : petals mostly 

 striped with red ; standard with a suborbicular notched blade : pods elongated, 5-10 cm. 

 long, broadly 4-winged, the wings undulate or incised. [Piscidia Erythrina L.] 



In sand, near the coast, southern Florida and the Keys. Also in the West Indies and in nor- 

 thern Mexico. 



29. PSORALEA L. 



Herbs or shrubs, with fibrous or much enlarged woody roots and dark or pellucid, 

 glandular foliage. Leaves alternate : blades 3-5-foliolate : leaflets with entire or toothed 

 blades. Flowers perfect, in axillary, usually peduncled spikes or racemes. Calyx-lobes 

 nearly equal or the lower longer. Corolla of various colors, often variegated : standard 

 broad, narrowed into a claw, the blades sometimes auricled : wings slightly scythe-shaped : 

 keel often shorter than the other petals, incurved. Stamens diadelphous or monadel- 



