132 LEGUMINO8.*;. MKLILOTUS. 



TBIFOLIl : M. 



grant flowers in slender axillary racemes. Calyx tubular or 

 campanulate, 5-toothed, persistent. Corolla deciduous, the upper 

 petal free, longer than the lateral ones, keel petals completely 

 united cohering with the lateral ones, all free from the stamens. 

 Stamens diadelphous. Style filiform. Pods coriaceous, globose 

 or ovoid, longer than the calyx, scarcely dehiscent, one to few- 

 seeded. 



M. Ixim'A All. Fl. Ped. i, 30H. M. parvijfora Desr. Stems erect or as- 

 cending, with spreading branches, 1-3 feet high, from an annual root : 

 leaflets of the lower leaves obovate aad often nearly entire, of the upper 

 ones cuneate-oblong or linear, truncate or emarginate, serrate ; stipules 

 linear-setaceous ; racemes at first dense, at length rather loose ; flowers 

 yello\v, small; teeth of the calyx broad, nearly equal, half the length of 

 the corolla; petals nearly equal: pods globose-ovate, wrinkled, 2-seeded. 

 In low grounds and along rivers. Introduced. 



M. ALBA. Lam. Encycl, iv, 63. Stems erect, branching, 3-6 feet high, 

 from a biennial root: leaflets ovate-oblong, truncate at the apex, mucro- 

 nate, remotely serrate; stipules setaceous: racemes elongated, panicled, 

 loose; teeth of the calyx unequal, as long as the tube; corolla white, 2-3 

 lines long, more than twice the length of the calyx, the upper petal longer 

 than the others : pods ovate, wrinkled, two-seeded. Along streams and 

 river bottoms. Introduced. 



7 TRIFOLIUM Tourn. lust. t. 228. L. Gen. n. 896. (CLOVER). 



Herbs with palmately orpinnately trifoliolate, rarely 5-7- folio- 

 late, leaves with adnate stipules, and usually numerous flowers 

 in capitate racemes, spikes or umbels, on axillary or apparently 

 terminal peduncles. Calyx 5-cleft or -parted, with nearly equal 

 teeth, persistent. Petals persistent, unguiculate, the claws all 

 more or less adnate to the stamina! tube, or the upper one free : 

 keel short, obtuse. Stamens diadelphous. Pods concealed with- 

 in or little exserted from the calyx, 1-6-seeded, dehiscent or in- 

 dehiscent. 



1. LUPIN ASTER Monch. DC. Prodr. ii, 200. Heads not in- 

 volucrate, dense : leaflets 5-7, rarely only o ; flowers sessile iteeth 

 of the calyx nearly equal, filiform, plumose : perennials. 



T. megaeephahim Xutt. Gen. ii, 105 (?). Stems stout, 4-8 inches 

 long, from a stout perennial root, decumbent or ascending, yillous, 1-2- 

 leaved below, and a pair of opposite ones at the summit ; stipules folia- 

 ceous, the lower ones lanceolate to oblong, irregularly incised with acumi- 

 nate lobes, to almost entire, the pair subtending the peduncle obliquely 

 ovate, 6-8 lines long by 4-6 lines broad, laciniately lobed and tpothed; 

 leaflets 5-7, obovate to oblanceolate, 4-10 lines long, spinulose-dentate, 

 apiculate, obtuse or emarginate, strongly veined: peduncle stout, appar- 

 ently terminal, longer than the leaves: flowers many, in dense capitate 

 spikes, very shortly pediceled, an inch or more long, ochroleucous and pur- 

 ple : tube of the calyx 1-2 lines long, the setaceous plumose teeth 5-6 

 times longer; upper petal broad, free, longer than, and enfolding the oth- 

 ers, wings and keel unguiculate, the claws adnate to the staminal tube : 

 pods sessile, ciliate near the apex, otherwise smooth, 4-6-ovuled, usually 

 2-seeded. In wet gravelly places, Eastern Oregon and Washington. 



T. Plummerae Watson P>ot. Oal.ii, 440 (?). Sterns cespitose, 1-3 inches 

 high, clustered at the crown of a thick perpendicular root, canescent with 



