96 PULSE FAMILY. 



++ .M. Pod indehiscent, very thick, 1 - ^-seeded. Calyx rvith 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 



axillary 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 composed of a pair 

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

 radicle. 

 ^-m-,. -M. Pod continuous, i. e. not in joints, at length opening, 2 - several-seeded. 



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



21. SESB ANIA. Herbs, with many pairs of leaflets, and minute or early deciduous 



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

 5-toothed. Standard rounded, spreading: keel and style incurved. 'Pod usu- 

 ally intercepted internally with cellular matter or membrane between the 

 seeds. 



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. 

 Flowers 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 twining. 

 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 of 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 and 

 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, blunt, 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, SUTHEKLANDIA, and CuANTiius, 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.) 



