PULSE FAMILY. 95 



* « Leaves mostly digitate or palmately Z-foUolate, all {with one exception) borne 



directly on the apex of the common petiole. 



9. TRIFOLIUM. Flowers in heads, spikes, or liead-like umbels. Calyx with 

 slender or bristle-form teeth or lobes. Corolla slowly withering or becoming 

 dry and permanent after flowering; the claws of all the petals (except some- 

 times the standard) more or less united below with the tube of stamens or 

 also with each other. Pod small and thin single - few-seeded, generally in- 

 cluded in the calyx or the persistent corolla. 



§ 3. Herbs or woody plants, sometimes twining, never tendril bearing, tcith the leaves 

 not digitate, or even digitately Z-foliolate {except in Psoralea), and the leaflets 

 not toothed. {For Cicer see the next section.) Stipules except in No. 15, 20, 

 and 27, not united with the petiole. 



* Flowers {small, in spikes or heads) indistinctly or imperfectly papilionaceous. Pod 



very small and usually remaining closed, only 1 - 2-seeded. Calyx b-toothed, 

 persistent. Leaves odd-pinnate, mostly dotted with dark spots or glands. 



-t- Petals 5, on very slender claws : stamens monadelphous in a split tube. 



10. PETALOSTEMON. Herbs, with crowded leaves. Four petals similar, spread- 



ing, borne on the top of the tube of the stamens; the fifth (answering to the 

 standard) rising from the bottom of the calyx, and heart-shaped or oblong. 

 Stamens only 5. 



11. DALEA. Herbs, as to our species. Flowers as in the last, but rather more 



papilionaceous, four of the petals borne on the middle of the tube of 10 

 stamens. 



-1- -1- Petal only one ! Stamens monadelphous only at the very base. 



12. AMORPHA. Shrubs, with leaves of many leaflets. Standard (the other pet- 



als wholly wanting) wrapped around the 10 filaments and style. Flowers 

 violet or purple, in single or clustered terminal spikes. 



* * Flowers {large andshowy, in racemes) incompletely papilionaceous from the wings 



or the keel also being small and inconspicuous. Pod several-seeded. 



30. ERYTHRINA. See p. 108. 



* * * Flowers obviously pajnlionaceons, all the parts conspicuously present. Stamens 



mostly diadelphous. 



.^~ Ovary l-ovuled, becoming a 1-seeded indehiscent akene-like fruit. Herbs. 



13. PSORALEA. Leaves of 3 or 5 leaflets, often glandular-dotted. Flowers (never 



yellow) in spikes or racemes, often 2 or 3 under each bract. Pod ovate, 

 thick, included or partly so in the 5-cleft persistent calyx, often wrinkled. 



14. ONOBRYCHIS. Leaves odd-pinnate, of numerous leaflets. Flowers racemed, 



rose-purple. Pod flattish, wrinkled and spiny-roughened or crested. 



15. STYLOSANTHES. Leaves pinnately 3-foliolate. Flowers yellow, in heads 



or short spikes, leafy -bracted. Ca"lyx with a slender stalk-like tube, and 

 4 lobes in the upper lip, one for the lower. Stamens monadelphous: 5 longer 

 anthers fixed by their base, 5 alternate ones by their ipiddle. Pod flat, retic- 

 ulated, sometimes raised on a stalk-like empty lower joint. Stipules united 

 with the petiole. 



16. LESPEDEZA. Leaves pinnately 3-foliolate. Stipules small and free, or fall- 



ing early. Flowers purple, rose-color, or white, in spikes, clusters, or pani- 

 cles, or scattered. Stamens diadelphous: anthers uniform. Pod flat and 

 thin, ovate or orbicular, reticulated, sometimes raised on a stalk-like empty 

 lower joint. 



■*- •*— Ovary with at least 2 ovules. 



*+ Pod separating into 2 or more small and closed 1-seeded joints in a row. 



17. DESMODIUM. Leaflets 3 (rarely only 1), stipellate. Pod of very flat joints 



(Lessons, p. 131, fig. 304), usually roughish and adhesive by minute hooked 

 pubescence. Herbs, withsmallpurple, whitish, or purplish flowers, in racemes, 

 which are often panicled. 



18. .^SCHYNOMENE. Leaflets several, odd-pinnate, small. Pod of very flat 



joints. Herbs, with small yellow flowers (sometimes purplish externally), 

 few or several on axillary peduncles. 



19. COBONILLA. Leaflets several, odd-pinnate, small. Pod of thickish oblong 



or linear joints. Herbs or shrubs, with flowers in head-like umbels raised on 

 slender axillary peduncles. 



