LUPIN US. 33 



E. Annuals: flowers verticillate, small, deep-Hue. 



Jj. polycarpus, Greene. Distinguished from L. mxranthus by stoute.-, rather suc- 

 culent stem: upper calyx-lip with teeth not divergent, lower slightly notched: corolla 

 smaller: base of the keel exposed: ridged pods, slightly falcate, 7-9 seeded. 



L. pachylobus, Greene. Stout, ridged, barely a foot high, hairy: petioles long and 

 slender: leaflets 5-7, 9 lines long: whorls 2-4 on stout peduncles: very hairy pod, 4-6 

 seeded. 



L. carnosolus, Greene. Stout and succulent stem, usually simple: raceme loose: 

 keel hairy in the middle. 



TBIFOL.IUM. 



Greene makes five species of T. Macrcei and its varieties, viz: 



T. Macraei, H. & A. Much branched, decumbent or almost prostrate, more or less 

 hairy: leaflets cuneate-oblong, denticulate above the middle: heads nearly or quite 

 sessile, 6 lines, or less, long: calyx teeth densely plumose, hairy, nearly equaling the 

 purplish corolla: pod 1 -seeded. A variety with smaller heads on very long peduncles. 

 Variable. 



T. dichotomum, H. & A. Stouter, often erect, flex nous and dichotomous: heads 

 long peduncled: calyx teeth equaling the red-purple corolla. 



T. amcenum, Greene. Erect, taller: heads 18 lines long: plumose calyx teeth, 

 much shorter than the conspicuous light rose-purple corolla. 



T. columbinum, Greene. Erect, rather silky: silky plumose dove-colored calyx 

 teeth, concealing the minute corolla. 



T. olivaceum, Greene. Olive-green heads, in which the corollas are concealed by 

 the calyx teeth, which are nearly naked at the setaceous tips. 



The clovers with flat laciniately-cleft involucres, are put under the following names 

 in Bay-Reg. BoL: 



T. Wormskjoldii, Lehm. Perennial: leaflets obovate-oblong, denticulate: heads 

 hemispherical, an inch or more broad, the involucre half as broad: 10-striate calyx 

 tube. The teeth much longer and sometimes cut into setaceous divisions. [This is 

 T. involucratum, var. heterodon, of this book.] 



T. variegatum, Nutt. Annual: leaflets obcordate to obovate-oblong: calyx-tube 

 about 15-nerved, the teeth broader than in the last. [A form of T. involucratum, 

 but the var. melauthum seems to be T. tridentatum, var. melanthum, and var. 

 major is var. obtusifl orum. ] 



T. appendiculatum, Loja. Flaccid, diffuse: keel of the corolla rostrate-attenuate. 



T. oliganthum, Steud., and the varieties, are in this book under T. paucijlorum. 



T. roscidum, Greene. Erect purple stems, flexuose: leaves soft, hairy, and very 

 clammy. [This, with T. obtusiflorum, have heretofore been by good authorities 

 considered as varieties or forms of T. tridentatum.] 

 Botany 3 



