LEGUMINOS^E. (PULSE FAMILY.) 51 



7. Dalea. Shrubby or herbaceous, with pinnate or palmate leaves and terminal spikes or 



heads. Wings and keel inserted on and articulated with the stamen tube. Pod 2 to 

 6-OVQled, mostly one-seeded. 



8. Petalostemon. Herbs, with odd-pinnate leaves and terminal spikes or heads. Stamens 



5 ; the cleft tube of filaments bearing 4 of the petals on its summit. Pod 1 to 

 2-seeded. 



9. Amorplia. Shrubs, with pinnate leaves and terminal racemes or spikes. Wings and 



keel of the corolla wanting. Stamens monadelphous only at base, otherwise distinct. 

 Pod 1 to 2-ovuled, 1 to 2-seeded. 



b. Shrubs or shrubby : herbage not glandular : leaves pinnate : pod fiat, 2-valved: stamens 



diadelphous. 



10. Peteria. Racemes terminal or opposite the leaves. Pod narrow, many-seeded. Leaflets 



not stipellate. 



11. Robinia. Pod thin, margined on one edge. Leaflets stipellate. 



c. Herbage glandular or glutinous and more or less punctate : leaves unequally pinnate : 



stamens diadelphous ; anthers confluently one-celled. 



12. Glycyrrhiza. Flowers, etc. of Astragalus. Pod prickly or muricate, short, one- 



celled. 



d. Herbage neither glandular nor dotted : stamens diadelphous ; anthers 2-celled : leaves 



pinnate. 



13. Astragalus. Tods mostly bladdery or turgid, or more or less 2-celled by intrusion of 



the dorsal suture. Keel not tipped with a point or sharp appendage. 



14. Oxytropis. Keel tipped with a point ; otherwise as in Astragalus. 



++++++ Herbs with odd-pinnate leaves and no tendril : pod transversely 2 to several-jointed, 

 the reticulated one-seeded joints iudehiscent. 



15. Hetlysarum. Stamens diadelphous (5 and 1). 



++++++++ Leaves abruptly pinnate, terminated by a tendril or bristle : stamens diadelphous : 

 peduncles axillary : pod 2-valved. 



16. Vicia. Stamen-tube oblique at the summit. Style filiform, hairy around and below 



the apex. 



17. Lathyrus. Stamen-tube nearly truncate. Style dorsally flattened toward the apex, 



hairy on the inner side, usually twisted half round. 



Suborder II. CJESALPINLflB. 



Flower more or less irregular. Perigynous disk lining the tube or 

 base of the calyx. Petals imbricated in the bud, the one corresponding 

 to the standard within the lateral ones. Stamens 10 or fewer, distinct. — 

 In ours the corolla is yellow and not at all papilionaceous. 



18. Cassia. Leaves simply and abruptly pinnate. Anthers either 10 and unequal, or some 



of the upper ones imperfect, abortive, or wanting. 



19. Hofifmaiiseggia. Leaves abruptly or unequally bipinnate, and dotted with black 



glands. Stamens 10, with anthers all perfect and tilaments hairy. Racemes opposite 

 the leaves. 



Suborder III. UIIMOSEvE. 



Flowers regular, small, and numerous in spikes or heads. No disk. 

 Calyx and corolla valvate in the bud. Stamens as many or twice as 

 many as the petals, hypogynous. Leaves usually twice pinnate. 



20. Schrankia. Petals united below into a cup. Pod covered with small prickles oi 



rough projections. 



