314 LEGUMINOSi52. Trifolium 



of the corolla.— P7rrs/!, fl. 2. f. 478; E77g. hot. t. 1170; E'h sk. 2. p. 202; 

 na I. c. ; Bi':d. p. Bost.p.27l; Hook. fl. Bor.-Am. I. p. 191; JJarlingt. 

 ji. Cest. p. 406. 



Meadows and cultivated fields, Canada! to Florida. Also Oregon, Dr. 

 Scouler, Do2(ff-his. Introduced from Europe. — (9) or 11 Leaflets glabrous 

 above, often marked with a pale lunulate spot. Flowers purplish-red : petals 

 all united into a tube at the base. — Common Clover. Bed Clover. 



7. T. medium (Linn.) : almost glabrous ; stem nearly erect, flexuous, 

 branching ; leaflets oblong or elliptical, nearly entire ; stipules lanceolate, 

 acuminate; heads of flowers subglobose, rather loose, solitary, more or less 

 pedunculate, sometimes bracteate ; teeth of the calyx setaceous, somewhat 

 hairy ; the lower one longest, shorter than the tube of the corolla. — Eve. 

 hot. t. 190 ; DC. prodr. 2. p. 195. T. flexuosum, Jacq. Ji. Austr. t. 386, 

 ex Seringe. 



Meadows, Essex county, Massachusetts, Mr. Oakes! Introduced.— 2^ 

 Heads larger than in the preceding species ; the flowers of a deeper purple 

 tint. Leaves without spots. 



8. T. longipes {l^niX.l mss.): " somewhat pubescent ; stem erect or as- 

 cending, simple ; leaves on slender petioles ; leaflets hnear-lanceolate, serru- 

 late, silky-pubescent beneath ; stipules semi-lanceolate, acuminate, foliaceous ; 

 heads roundish-ovate, ebracteate, on very long peduncles ; segments of the 

 calyx setaceous, much longer than the tube, somewhat equal ; petals lanceo- 

 late ; ovary 5-ovuled. 



" Valleys of the central chain of the Rocky Mountain range, and on the 

 moist plains of the Oregon as low as the Wahlamet ; forming extensive 

 fields of herbage. May-July. — U Root creeping. Stem 2-3 inches to a 

 foot high. Lower petioles 3-4 inches long in tall specimens ; upper ones 

 about an inch in length : leaflets of the lower leaves elliptical. Peduncles 

 2-S inches long: heads nearly an inch in diameter. Flowers ochroleuccus: 

 petals almost acuminate ; the keel and wings united with the stanien-tube ; 

 vexillum free." Nattall. 



9. T. Andinum (Nutt. ! mss ) : "caespilose, silky-canescent ; caudex short 

 and thick, branched above ; leaves mostly radical ; leaflets cuneate-oblong, 

 apiculate; stipules broadly ovate, membranaceous ; heads of flowers hemi- 

 spherical, solitary, on short scapes, bracteate at the base, with 2 sessile sheath- 

 ing leaves; calyx densely villous; teeth subulate, shorter than the tube ; ova- 

 ry 3-4-ovuled ; legume 1-seeded. 



" Summit of dry rocky hills in the central chain of the Rocky Mountain 

 range. May-June.— li Plant in dense clusters, scarcely rising two inches 

 above the surface ; the caudex chiefly subterranean. Petioles half an inch 

 to an inch in length; leaflets rigid, slightly serrulate towards the extremity, 

 3-5 lines long. "Heads half an inch in diameter, with roundish scarious 

 bracts at the base, subtended bv a pair of opposite bracteal leaves ; the large 

 membranaceous stipules of which bear a sessile trifoliolate lamina, similar to 

 the other leaflets of the plant. Flowers rather small, ochroleucous [persist- 

 ent and turning brown ?], rather small: vexillum free." Nuttall.—A curious 

 truly alpine species, perhaps not properly referred to this section of the genus. 



** Corolla persistent, never yellow , usually becoming scarious or rather coriaceous and 

 turjiing broicnishtvlien old: flowers in globose heads or umbels {rarely few), de- 

 fiexed when old : calyx not inflated after flowering. 



10. T. nanum (Torr.) : glabrous, ceespitose ; caudex very short, branching 

 above ; leaflets 3, obovate-cblong, somewhat acuminate, denticulate, strongly 

 reined, on rather long petioles; stipules membranaceous, ovate, cuspidate; 

 peduncles very short, radical, umbellat^ly about 3-flowered ; flowers large ; 



