LEGUMINOS.K. (PULSE FAMILY.) 93 



and jointed peduncles. Sepals 5, colored, deciduous. Petals 5, 

 shorter than the sepals ; the -o posterior ones long-clawed, often 

 united ; the 2 anterior broad, sessile and fleshy. Stamens 4, the pos- 

 terior ones distinct or united. Anthers 2-celled, opening by a termi- 

 nal pore. Ovary 1-celled, 2-ovuled. Fruit 1-seeded, woody, indehis- 

 cent, armed with hispid prickles. Albumen none. Radicle concealed 

 in the cotyledons. 



1. KRAMERIA, Loefl. 



Characters of the order. 



1. K. lanceolata, Torr. Herbaceous; stems slender, prostrate, mostly 

 branching; leaves lanceolate or linear, acute; peduncles longer than the 

 leaves, leafy-bracted above the middle ; claws of the posterior petals, and 

 stamens, united; fruit globose, downy, armed with few strong spreading 

 spines. Dry saudy soil, Florida, and westward. Root long and woody. 

 Stems 1 long. 



ORDER 47. LEGUMINOS^E. (PULSE FAMILY.) 



Herbs, shrubs, or trees, with chiefly compound alternate stipulate 

 leaves, and papilionaceous or regular perigynous or hypogynous 

 flowers. Sepals 5, more or less united. Petals 5, rarely fewer, or 

 none. Stamens monadelphous, diadelphous, or distinct. Ovary 

 simple, free, forming a legume in fruit. Seeds without albumen. 

 Leaves almost always with entire margins. 



Synopsis. 



SUBORDER I. PAPILIONACE^E. Corolla of 5 (rarely fewer) irregular 

 petals, inserted on the base of the calyx, rarely perigynous, imbricated in the 

 bud, mostly papilionaceous ; viz. one upper and exterior, termed the vexillum 

 or standard ; two lateral, called iriiiys ; and two lower and interior, oftener 

 united by their contiguous margins, forming together the keel. Stamens 10 

 (rarely 5), separate, monadelphous, or diadelphous (9 & 1, or 5 &5). Legume 

 1-celled (sometimes partly 2-celled by the introversion of the sutures), or sev- 

 eral-celled by transverse partitions. Style simple. Cotyledons thick. 



TRIBE I. L.OTE.33. Corolla papilionaceous. Stamens 10 (except No. 8). Logume con- 

 tinuous (not jointed). Cotyledons leafy in germination. Stems (except No. 12) not 

 twining nor climbing. 



* Stamens monadephous : anthers of 2 forms. Leaves simple, or pahnately compound. 



1. CROTALARIA. Calyx 5-lobed. Legume inflated. Upper stipules decurrent. 



2. LUPINUS. Calyx 2-lipped. Legume flattened. Stipules not decurrent. 



* * Stamens diadelphous : anthers alike. Leaves trifoliolate, rarely palmate or pinnate, 



the earliest ones alternate. 



3. MEDICAGO. Legume membranaceous, curved or coiled, 1 - many-seeded. Flowers 



racemed. 



