r 



110 .XL. LEGUM1N0SJ5. [Fultenm. 



. Leaves uot or scarcely incurved. Stipules none. 



Calyx shortly villous, the 2 upper lobes rather large .... 32. P. sulmmbellaia. 

 Calyx plumose with long hairs, the 2 upper lobes very large . 33. P. urodon. 



B, Leaves concave or nearly flat, obtuse acute or mucronate hut not puvgent, often 

 narrow-linear but not terete. Stipules conspicuous, united at the base within the leaf at 

 least on the young shoots. Flowers in dense terminal heads. (Eastern species,) 



Bracteoles inserted on or adnate to the calyx-tube. 

 - Leaves linear, acute, almost fat. 



Stipules long, imbricate. Leaves 1 to 1^ in. long. Calyx 



villous 34, p^ stipularis, 



btipuies not imbncate. Leaves under | in. Calyx and whole 



plant glabrous %^o, P. olahra. 



Leaves veiy concave, hnear-obtuse, mucronate or scarcely acute, 

 rarely above J in. long. 



Leaves not aristate. Bracts broad, imbricate. Calyx hirsute 



with short hairs %^. F. dentata, 



Upper leaves and calyx-lobes aristate. Bracts few. Calyx 



villous with long hairs . 37. P arislaia. 



Bracteoles close uuder the calyx-tube, but free from it. 



Leaves narrow-oblong or almost linear, obtuse. Flowers nearly 



sessile 3g^ p'.phmosa. 



Leaves hnear or Imear-lauceolate, acute. Flowers shortly pedicel- 

 late m the head 39. P.w^^^a. 



C. Leaves terete or trigonous, not pungent, channelled above. Stipules united at th 

 base witkm the leaf, at least on the young shoots. Flowers in dense terminal heads. 

 (-tastern species.) 



Bracteoles close under the calyx, but free from it 



Leaves crowded, incurved, with fine points \ 40 P. echinula. 



Leaves obtuse acute or shortly mucronate. 



Bracts broad. Flowers yellow 4.1, F, hibbertioides. 



Bracts narrow. Flowers pink 43. p. ,^,^^. 



Bracteoles mserted on or adnate to the calyx-tube ...... 43. P. mollis. 



D. leaves terete or tngonons, channelled above. Stipules small and distinct or minute 

 or none Flowers m terminal, leafless, or rarely leafy heads, or [in P. ueurocalyx) axil- 

 lary. Bracteoles close under the calyx, but free from it (Western species.) 

 Flower.heads dense. Bracts imbricate, completely covering the 



. Heads ovoid-globiilar. Bracts appressed, shortly toothed ... 44. P. slrobilifera. 



Heads bix)adly globular. Bracts spreading at the top, deeply lobed 45. P. ericifolia. 

 riower-heads dense Bracts imbricate but few and small, or much 

 snorter thau the calyi. 



Heads many-flowered Leaves straight or incurved. Stipules 



minute, setaceous. Bracts entire or 2-lobed . . . . . . 46. P. verruculosa. 



Head, small. Leaves snaall, mostly recurved. Stipules minute 

 Tlnwo r ■• ^"'f ' ^'^Y ^ ''^"^^ '""f-"ke middle lobe . . .4?. P. empefrifon". 



out of the shoot Bracts none besides the tloral leaves 

 Ca yi silky-villous, the 2 upper lobes much larger than the others 48. P. adunca. 

 Calyx glabrous, ngxd, strongly striate as weU as the bracteoles, 



the lobes nearly equal '. m. P. neurocalux. 



. J;i?f ^'^y^^ Pungent, nearly fiat, concave or terete and channelled above. Silpl» 

 Leaves lanceolate, concave or conduplicate. Flowers distinctly pe- 





• 



50. P. rlgida 



