102 PULSE FAMILY. 



•<- 1- Flowers flesh-cohr 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, y. 

 T. pratense, Red C. Stems ascending ; leaflets oboyate 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. refl6xum, 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-secded. © ® 



T. stoloniferum. 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. ® 1J. 



T. Caroliniaiiuni, 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. ^ 



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, y. 



10. PETALOSTEMON, PRAIRIE CLOVER. (Name composed of 

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

 W. and S. : flowers never yellow. Ij. 



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



P. COrymbdsus. 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. viol^ceus. 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. eandidUS. 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. alopeeuroides. 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. ® 



