Nn i a a hs Al i 
CYTISUS. * LEGUMINOS. 131 
MEDICAGO. 
@n sandy plains about the mouth of :the. Columbia river.. Introduced 
from Europe. . * 
4 CYTISUS L. Gen. n. 877. 
Shrubs with green, more or less leafy angular branches, palm- 
ately or pinnately trifoliolate leaves, minute or inconspicuous 
stipules and solitary or racemous, yellow or white flowers. Calyx 
with campanulate tube and bilabiate limb. Petals broad, ungui- 
culate, free, the keel obtuse. Stamens 10, monadelphous ; anth- 
ers In two sets, the outer ones short and versatile, the alternate 
ones long and basifixed. Ovary mostly sessile, many-ovuled ; 
stvle glabrous, incurved; stigma terminal, capitate or oblique. 
Pod compressed, several-seeded. 
C. scoparis Link. Enum. ii, 241. (Scorcu Broom). A much branched 
shrub 3-8 feet high with prominently angular green branches; sparingly 
_ leafy, leaflets glabrous, often 1 only: flowers large, bright yellow, solitary 
or in pairs along the branchlets, in the leaf-axils and apparently racemose : 
pods pilose along the margins. Becoming common in many places. In- 
troduced from Europe. 
Tribe 3. Trifoliee Bronn. DC. Prodr. ii, 171. Erect or pro- 
cumbent, mostly low herbs, rarely a little shrubby, with palmately 
or prnnately trifoliolate, rarely 5-7-foliolate leaves, the leaflets often 
toothed or serrulate, and axillary or terminal, racemose, spicate, 
capitate or umbellate inflorescence. Corolla papilionaceous. Sta- 
mens diadelphouis. Pod continuous, 1-celled, several-seeded and de- 
hiscent, or one to few-seeded and nearly indehiscent. Radicle in- 
flexed. 
5 MEDICAGO Tourn. L. Gen. n. 899. 
Herbaceous, or rarely shrubby, plants with palmately trifolio- 
late leaves, often incised stipules, and axillary, 1-2- or many- 
flowered peduncles. Calyx somewhat cylindrical, 5-cleft. Keel 
of the corolla remote from the upper petal. Pod usually many- 
seeded, of various forms, falcate or spirally coiled. 
M. sativa Moris. Hist. ii, 150. (Anrautra). Perennial; glabrous: stems 
erect, 2-4 feet high: leaflets cuneate-oblong or oblanceolate, toothed above, 
mucronate; stipules lanceolate, somewhat toothed: flowers numerous, 
racemose, violet: pods spirally coiled, unarmed. Fields and roadsides, 
sparingly introduced. 
M. tuporrsa L. Sp. 779. Annual, slender, procumbent, 1-2 feet long, 
soft-hairy: leaflets obovate, small: flowers minute, insmall, oblong heads ; 
yellow: pod small, reniform or curved almost into a ring, black when ripe, 
l-seeded. Klickitat Co., Washington. Introduced from Asia. 
M. penticutata Willd. Sp. iii, 1414. (Bur-Crover). Annual, much 
branched, decumbent, glabrous: leaflets obovate or obcordate, denticulate : 
flowers 2-3, yellow: pods coiled into 2 circles, their margins armed with 
hooked prickles. Introduced from Asia. 
6 MELILOTUS Tourn. Inst. t. 226 L. Gen. n. 899 (Sweet CLOVER). 
Erect herbs with pinnately trifoliolate leaves and small fra- 
