L32 LEGUMINOSjE. melilotus. 



TRIFOLIUM. 



gram 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 stamen-. 

 Stamens diadelphous. Style filiform. Pods coriaceous, globose 

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

 seeded. 



M. Indka All. Fl. Ped. i, 303. M. parviflora Desv. Stems erect or as- 

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

 leaflets of the lower leaves obovate a.id 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 

 yellow, small; teeth of the calyx broad, nearly equal, half the length of 

 the corolla ; petals n earl y equal : pods globose-ovate, wrinkled, 2-seeded. 

 In low grounds and along rivers. Introduced. 



M. alba. ham. 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. J ntroduced. 



7 TRIFOLIUM Tourn. Inst. t. 228. L. Gen. n. 896. (Clover). 



Herbs with palmately or pinnately 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 (daws all 

 more or less adnate to the stamina] tube, or the upper one tree: 

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

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

 dehiscent. 



:< 1. Lupinaster Monch. DC. E*rodr. ii, 203. Heads no1 in- 

 volucrate, dense : leaflets 5-7, rarely only 8 ; flowers sessile :teeth 



of the calyx nearly equal, filiform, plumose: perennial-. 



T. megacephalnm Nutt. Gen. ii. L05 (?). stems stout. 4-8 inches 

 Long, from a stout perennial root, decumbent or ascending, villous. 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 p?duncle obliquely 

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

 leaflets 5-7, obovate to oblanceolate, 4-10 lines Ion*);, spinulose-dentate, 

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

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

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

 ple: tube of the calyx 1,-2 lines rong, 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-ovufed, usually 

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



T. Plummera? Watson Bot. Cal.ii, 440 i ? . Stems cespitose, 1-3 inches 

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



