220 LEGUMINOS^. (pulse FAMILY.) 



15. O. pliyllocepiaala, Boiss. .3 to .4, hirsute ; stems as- 

 cending. Leaves sliort-petioled, trefoil with obovate to oblong or ob- 

 long-linear, striate, acutely serrate leaflets. Flowers nearly sessile, 

 crowded in an oblong sjyilce or liead with imbricated usually simple floral 

 leaves, in fruit much elongated ; calyx-lobes lanceolate acuminate, 

 thrice as long as tube, longer'than corolla ; pod ovate, .004 long, half 

 as long as calyx; seeds 1-2, tubercled or smooth — Spring — Fields 

 along the coast. 



Further study may reduce the last three species to one. 



16. O. uiiti§§ima, L. .4 to .5, stems erect, branching, sparse- 

 ly crisp-puberulent. Leaves short-petioled, glabrescent, shining, the 

 lower trefoil, the upper simple, leaflets elliptical, cuneate at base, striate, 

 sharply denticulate. Flowers short-peduncled, forming .02 to .03 long, 

 dense, terminal, oblong spikes, leafy at base, dracteate uitTi leafless, in- 

 flated, icMte, scarions, inibricated stijmles, covering the calyx-tidjes ; calyx- 

 lobes lanceolate, spiny-tipped, ciliate, as long as tube, somewhat shorter 

 than corolla ; pods ovate, .005 long, nearly as long as calyx ; seeds 2- 

 3, tubercled — Spring — Fields ; common to subalpine regions of 

 mountains. 



17. O, alopecuroides, L. .3 to .5, sparingly hairy, stem 

 erect, branching. Leaves simple, sessile, imtli a two-eared, stipular sheath, 

 oblong to elliptical, .03 long, .015 broad, truncate, or obtuse, serrate. 

 Flowers nearly sessile, forming .04 to .1 long, dense, terminal spikes ; 

 floral leaves linear ; calyx-lobes hirsute, linear, twice as long as tube, 

 longer than corolla ; pod ovate, half as long as calyx ; seeds 2, 

 shining, slightly pitted — Spring — Fields ; coast to middle zone of 

 mountains. 



14. TRIGOJSfEL.L-A, L. Trigonella. 



Calyx-lobes 5. Keel obtuse. Stamens diadelphous, free from pe- 

 tals ; filaments not dilated at apex. Pod linear, lanceolate, oblong, or 

 ovate, terete or compressed, sometimes flat and broad, beaked — An- 

 nual, rarely perennial herbs, exhaling the odor of Coumarin, with pin- 

 nate-trefoil leaves, stipules adnate to petiole. 



* Pods oUong, linear, or lanceolate, terete or compressed. 



t Pod$ erect or spreading. 



X Flotcers capitate, Hue, pods oblong, oblique, .003 to .015 Zor*^. 



1 T. azurea, 2 Besseriaoa. 



X X Flouers sessile, axillary, solitary or twin, yellowish-white or bluish ; 

 pods long, terete, long.-beaTced, with anastomosing 7ierves. 



3 T. Fcenum-Grsecum, 4 Cassia. 



XXI Flowers in umbels, heads, or short racemes, .004 to .008 long, 

 (ours) yellow. Pods linear, terete or flattened, reticulate, 

 with a suture on both edges. 



§ Common peduncle as long as leaf or longer. 



5 T. astroites. 



§ § Comraon peduncle short or 0. 



6 T. spinosa, 7 crassipes, 8 Monspeliaca, 9 Noeana, 10 monantha. 



