_ Pegs a ee 
3 Trifolium (Tourn.) L. Clover, Trefoile 
Low annual or perennial herbs with alternate trifoliolate leaves 
and flowers in head-like clusters subtended by bracts which may be united 
into a cup-shaped involucree Calyx tubular-campanulate, 5-lobed, the 
lobes mostly subequal. Corolla withering-persistent over the short 
pod, purple, pink or white. stamens 10, the upper one free, the remainder 
united, Pod included within the persistent corolla, with few or solitary 
seedSe 
© Heads 5=10 mn, in diameter; annuals 
7, Heads naked, the flowers reflexed in age { Te procumbens 
s~ 
— 
4 Heads subtended by a cup-shaped, 8-9 
i, lobed involucre 2 Te microcephalun 
~~ 
© Heads 10-50 ma, in diameters; perennials 
2 Flowers rose-purple, fading blue 
4 Herbage and calyces glabrous 3. Te Douglasii 
4 Herbage and calyces hairy 4 TT. pratense 
» Plowers white, sometimes tinged with lavender 
(4 or rose, fading cream color or brownish 
4: Calyces hirtellous, the teeth 35-4 m, long 7 Te latifolium 
~_ 
4 Calyces glabrous, the teeth 2 mn, long ¢. Te repens 
i 
4 
die 
<a ep alle ees ea 
ao iene 
