96 PULSE FAMILY. 



-M.-t-4- Pod indefiiscent, very thick, 1-3-seeded. Calyx with a long, thread-shaped 

 or stalk-like tube. Leaves abruptly pinnate : stipules united with the petiole 

 at base. 



20. ARACHIS. Annual. Leaflets 4, straight-veined. Flowers small, yellow, in 



axillarv heads or spikes. Calyx with one narrow lobe making a lower lip, 

 the upper lip broad and 4-toothed. Keel incurved and pointed. Stamens 

 monadelphous, 5 anthers longer and fixed by near their base, the alternate 

 ones short and fixed by their middle. Ovary at the bottom of the very long 

 and stalk-like tube of the calyx, containing 2 or 3 ovules : when the long style 

 and the calyx with the rest of the flower falls away, the forming pod is pro- 

 truded on a rigid deflexed stalk which then appears, and is pushed into the 

 soil where it ripens into the oblong, reticulated, thick, coriaceous fruit, which 

 contains the 1-3. large and edible seeds; the embryo compo>ed of a pair 

 of very thick and fleshy cotyledons and an extremely short nearly straight 

 radicle. 



.w *+ -w. Pod continuous, i. e. not in joints, at length opening, 2 - several-seeded. 

 a. Leaves abruptly pinnate : plants not tinning. (Flowers in ours yellow.) 



21. SESBANIA. Herbs, with many pairs of leaflets, and minute or early decidiious 



stipules. Flowers in axillary racemes, or sometimes solitary. Calyx short, 

 6-toothed. Standard rounded, spreading: keel and style incurved. 1'od usu- 

 ally intercepted internally with cellular matter or membrane between the 

 see'ds. 



92. CARAGANA. Shrubs, with mostly fascicled leaves of several pairs of leaflets, 

 and a little spiny tip in place of an end leaflet: stipules minute or spiny. 

 Flower? solitary or 2 - 3 together on short peduncles. Calyx bell-shaped or 

 short-tubular, 5-toothed. Standard nearly erect with the sides turned back: 

 the blunt keel and the style nearly straight. Pod linear, several-seeded. 



b. Leaves odd-pinnate : stems not tivining. 



1. Anthers tipped with a little gland or blunt point. 



23. INDIGOFERA. Herbs, or sometimes shrubby, when pubescent the close- 



pressed hairs are fixed by the middle. Flowers rose-color, purple, or white, 

 in axillary racemes or spikes, mostly small. Calyx 5-cleft. Standard round- 

 ish, often'persistent after the rest o'f the petals have fallen: keel with a pro- 

 jection or spur on each side. Pod oblong, linear, or of various shapes, com- 

 monly with membranous partitions between the seeds. 



2. Anthers blunt and pointless. 



24. TEPHROSIA. Herbs, with obliquely parallel-veined leaflets often silky be- 



neath, and white or purple flowers (2 or more in a cluster) in racemes; the 

 peduncles terminal or opposite the leaves Calyx 5-cleft or 5-toothed. Stand- 

 ard rounded, silky outside. Style incurved,' rigid: stigma with a tuft of 

 hairs. Pod linear, flat, several-seeded. 



25. ROBINIA. Trees or shrubs, with netted-veined leaflets furnished with stipels, 



and often with sharp spines or prickles for stipules. Flowers large ami 

 showy, white or rose-color, in axillary racemes. Base of the leafstalk hollow 

 and covering the axillary bud of the next year. Calyx 5-toothed, the two 

 upper teeth partly united. Standard large, turned back: keel incurved, 

 blunt. Ovary stalked in the calyx. Pod broadly linear, flat, several-seeded, 

 margined on the seed-bearing edge, the valves thin. 



26. COLUTEA. Shrubs, not prickly, and no stipels to the leaflets: the flowers 



rather large, yellow or reddish, in short axillary racemes. Calyx 5-toothed. 

 Standard rounded, spreading: keel strongly incurved, bhint, on long united 

 claws. Style incurved, bearded down one side. Pod raised out of the calyx 

 on a stalk of its own, thin and bladdery-inflated, flattish on the seed-bearing 

 side, several-seeded. 



27. ASTRAGALUS. Herbs, without stipels, and with white, purple, or yellowish 



rather small flowers in spikes, heads, or racemes : peduncles axillary. Co- 

 rolla narrow : standard erect, mostly oblong. Style and stigma smooth and 

 beardless. Pod commonly turgid or inflated and 'within more or less divided 

 lengthwise by intrusion of the back or a false partition from it. 



(SWAINSONA, SUTHERLANDIA, and CLIANTHUS, plants from Australia, 

 New Zealand, and South Africa, with showy flowers and bladdery-inflated 

 pods (like Colutea), are sometimes cult, in conservatories, but are not com- 

 mon enough to find a place here.) 



