Part 1, 1919] 



FABACEAE: PSORALEAE 



1!) 



rarely 7 or S, monadelphous, the tube usually split on the upper side. Ovary 1- or 2-ovuled. 

 Stigma capitate. Pod indehiseent, obliquely obovoid or semi-reniform, mostly included in 

 the calyx. 



Type species, Psoralea mutabilis Cav. 



Flowers pedicelled, reflexed. 

 Flowers sessile, ascending. 



Subgenus 1. Trichopodium. 

 Subgenus 2. Euparosela. 



Subgenus 1. TRICHOPODIUM. Flowers racemose, with distinct (although sometimes 

 short) pedicels, reflexed, and with a distinct joint below the flowers. Bracts early deciduous. 

 {Trichopodium Presl. Marina Liebm. Carroa Presl.) 



Calyx-lobes lanceolate to ovate, shorter than or barely equaling the tube. 

 Leaflets several. 



Calyx hairy without; glabrous or slightly pubescent herbs. 



Calyx-lobes distinctly toothed. I. Delicatae. 



Calyx-lobes entire. II. ChrysorhizaE. 



Calyx glabrous without. 

 Calyx hairy within. 



Calyx strongly angled, not conspicuously glandular. III. DivaricataE. 



Calyx not strongly angled, conspicuously glandular. IV. Lasiostomae. 



Calyx glabrous within. V. Diffusae. 



Leaflets 1-3. VI. Unifouatae. 



Calyx-lobes longer than the tube. 



Calyx-lobes lance-subulate, not plumose (except in P. filiciformis) ; 

 flowers not subtended by glands. 

 Corolla inconspicuous, shorter than the calyx; keel-petals not 



much exceeding the other petals in length; annuals. 

 Corolla conspicuous, longer than the calyx; keel-petals much ex- 

 ceeding the other petals; perennials. 

 Calyx-lobes filiform, plumose; flowers subtended by 1-3 prominent 

 acute glands ; petals with glands near the bases. 



. Vetulae. 



. CalycosaE. 



'.. Lachnostachydes. 



1. P. delicala. 



I. Delicatae 

 One species. 



II. ChrysorhizaE 

 Leaves glabrous or nearly so. 



Stem erect, glabrous or sparingly strigose. 

 Racemes dense and spike-like. 

 Calyx erisp-hairy. 



Calyx sparingly hairy; lobes purple-tipped, ovate-lanceolate, 



obtuse except the lowest one. 2. P. spiciformis. 



Calyx more conspicuously hairy; lobes all acute. 3. P. neglecta. 



Calyx densely silky; lobes triangular-lanceolate at the base, more 



or less subulate-acuminate. 74. P. vemicia. 



Racemes lax, rather few-flowered. 



Plant annual, herbaceous; stem sparingly strigose at least above. 4. P. pueblensis. 

 Plant perennial, shrubby below; stem glabrous. 



Leaflets not punctate above; calyx-lobes ovate or lanceolate, 

 at least one half as long as the tube. 

 Leaflets about 2 mm. long, retuse; calyx 2.5 mm. long. 5. P. Palmeri. 



Leaflets 7-10 mm. long, obtuse; calyx 3-3.5 mm. long. 3. P. neglecta. 



Leaflets punctate above; upper 4 calyx -lobes broadly tri- 

 angular, less than one third as long as the tube. 86. P. hospes. 

 Stem decumbent or spreading from the base, usually more or less 

 pubescent. 

 Stem densely pilose, not filiform; racemes many-flowered; flowers 7 



mm. long. 6. P. procumbens . 



Stem sparingly puberulent or glabrous, filiform; racemes few-flow- 

 ered; flowers about 5 mm. long. 

 Sepals obtuse; leaflets glandless. 7. P. Holwayi. 



Sepals acute or apiculate; leaflets conspicuously glandular-punc- 

 tate. 8. P. chrysorhiza. 

 Leaves decidedly hairy. 



Pubescence of the stem, petioles, rachis, and peduncles spreading. 



Plant erect, perennial. 9. P. Goldmani. 



Plant spreading, annual. 10. P. peninsularis. 



Pubescence of the stem, petioles, rachis, and peduncles strigose-can- 

 escent. 

 Calyx canescent all over. 11. P.Parryi. 



Calyx glabrous below, canescent-hirsute above. 13. P. maritima. 



III. DIVARICATAE 



Leaves pubescent. 



Leaves sparingly pilose; stem glabrous. 12. P. Anlhonyi. 



Leaves densely strigose; stem canescent. 13. P. marilima. 



