102 PULSE FAMILY. 



■•- 1- Flowers flesh-color or whitish with a purplish spot, in a very soft silky head. 



T. arv6nse. Rabbit-foot or Stone C. Erect, silky-downy, especially 

 the oblong or at length cylindrical grayish heads or spikes, the corollas almost 

 concealed by the plumose-silky calyx ; leaflets narrow. 



* * Larger, rose-red-flowered Clovers, cult, from Europe for fodder, or running 



wild : heads thick and dense : corolla tubular, withering away after flower- 

 ing : flowers sweet-scented, in summer. ^ 



T. pratdnse, Red C. Stems ascending ; leaflets obovate or oval, often 

 notched at the end and with a pale spot on the face ; head closely surrounded 

 by the uppermost leaves. 



T. medium, Zigzag C, with a zigzag stem, more oblong entire and 

 spotless leaves, and head usually stalked, is rare, but has run wild E., and 

 passes into the last. 



* * * Low, wild Clovers, or one cult, from Europe, with spreading or running 



stems, and mostly pale or white flowers [remaining and turning brownish in 

 fading) on pedicels, in round umbels or heads, on slender naked peduncles : 

 fl. spring and summer. 



T. reflexum, Buffalo C. Wild S. and especially W. : somewhat 

 downy, with ascending stems 6' -12' high, obovate-oblong finely-toothed leaf- 

 lets, heads and rose-red and whitish flowers fully as large as in Red Clover, 

 calyx-teeth hairy, and pods 3 - 5-seeded. (T) (5) 



T. Stolonifemm, Running Buffalo C. Prairies and oak-openings 

 W. : like the last, or a variety of it, but some of the stems forming runners, 

 leaflets broadly obovate or inversely heart-shaped, flowers barely tinged with 

 purple, and pods 2-secded. @ y, 



T. Carolinianum, Carolina C. Fields and pastures S. : a little downy, 

 spreading in tufts 5' - 10' high, with small inversely heart-shaped leaflets, broad 

 stipules, and small heads, the purplish corolla hardly longer than the lanceolate 

 calyx- teeth, y. 



T. ripens, White C. Fields, &c. everywhere, invaluable for pasturage : 

 smooth, with creeping stems, inversely heart-shaped leaflets, long and slender 

 petioles and peduncles, narrow stipules, loose umbel-like heads, and white 

 corolla much longer than the slender calyx-teeth. ;^ 



10. PETALOSTEMON, PRAIRIE CLOVER. (Name composed of 

 the Greek words for petal and stamen combined. ) In prairies, pine-barrens, &c. 

 W. and S. : flowei's never yellow, y. 



* Heads crowded in a corymb, leafy-bracted : fl. late in autumn. 



P. eorymbbSUS. In southern pine-barrens ; 2° high, with leaves of 3-7 

 filiform leaflets, and white flowers, the slender teeth of calyx becoming plumose. 



* * Heads or mostly spikes single terminating stems : fl. summer. 



P. violkceus. Prairies W. : smoothish or pubescent, 1° - 2° high, with 

 mostly 5 narrow-linear leaflets, a short spike even when old, rose-purple flowers, 

 and hoary calyx. 



P. earneus. Dry barrens S. : smooth, with branching stems, 5-7 linear 

 leaflets, long-peduncled short spikes, flesh-color or pale rose flowers, and gla- 

 brous calyx. 



P. e^ndidus. Prairies W. & S. : smooth, 2° - 3° high, with 7-9 lan- 

 ceolate or linear-oblong leaflets, long-peduncled spikes, with awn-pointed bracts, 

 and white flowers. 



There are besides one or two rarer species W., and several more far W. & S. 



11. DALE A. (Named for an English botanist, Thomas Dale.) There are 

 many species S. W. beyond the Mississippi. 



D. alopecuroldes. Alluvial river banks W. & S. ; with erect stem 

 1° - 2° high, .smooth leaves of many linear-oblong leaflets, and whitish small 

 flowers in a dense silky spike, in summer. ® 



