132 SELAGINE® (Rolfe). 
Leaves 2-4, rarely 6 lin. long : 
Heads numerous, arranged 
in dense narrow panicles 
Heads usually few, arranged 
in lux panicles: 
Leaves crowded right up 
to the inflorescence ... 
Leaves small or lax near 
the inflorescence ‘ 
Leaves oblong, 1-2 lin. long, rarely 
longer and slender: 
Flowers in compact narrow 
panicles 
Flowers in short or - oblong spikes 
ttPanicles small, often reduced to simple 
spikes ; leaves small and rigid : 
Calyx ? aia long; corolla-tube 3-1 lin. 
long 
ivadtiien canescent or minutely pu- 
berulous : 
Leaves not squarrose : 
Leaves 1-3 lin. long 
Leaves #-14 lin, loug 
Leaves squarrose or recurved 
Branches pubescent or puberulous with 
ferruginous hairs.. 
Calyx re lin. long ; corolla-tube 1g lin, 
long ... 
{Flowers in pon. often dense, more or less 
corymbose panicles, rarely reduced to 
simple spikes or heads ; 
} Flowers sessile or subsessile: 
Leaves generally oblong, rigid and more 
or less spreading : 
Calyx pubescent or villous : 
Leaves not half as broad as long : 
Corolla-tube 23-3 lin. long ws 
Corolla-tube 14-2 lin. long: 
Leaves strongly hispid or setu- 
lose eve rae vis 
Leaves minutely hispidulous or 
nearly glabrous : 
Calyx 1 lin. long; corolla-tube 
. 1} lin, long nee 
Calyx 14 lin. long; corolla 
tube 2 lin. long - 
Leaves half as broad as long: 
Leaves very villous... 
Leaves glabrous 
Calyx puberulous : 
Leaves uniformly green ; bracts sub- 
acute 
Leaves minutely black punctate ; 
bracts obtuse... 
Leaves broad or narrow, but not rigid 
(except in short-leaved forms of 57, 
8. corymbosa) : 
Inflorescence broadly and densely 
corymbose or the heads corym- 
bosely arranged and usually 
narrow : 
[ Selago 
(31) Saundersie. 
(32) Bolusii. 
(33) albida. 
(34) winutissima, 
(35) divaricata. 
(36) Burkei. 
(37) Zeyheri. 
(88) tenuis. 
(39) ferruginea. 
(40) rigida. 
(41) polystachya. 
(42) seabrida. 
(43) luxurians. 
(44) Dregei. 
(46) brevifolia 
(47) glomerata. 
(48) punctata. 
