1106 The Achenial Hairs of Townsendia. [ November, 
capillary filaments intermingled with the stout pappus-bristles, 
Three species T. Fendleri, T. mexicana and T. Watsoni have very 
short achenes. For the other characters used in drawing out the 
following analysis, I am indebted almost exclusively to Gray's 
synopsis of the genus. 
SPECIES OF TOWNSENDIA, HOOK. 
A. sop: Ogee decidedly acuminate ; head large. 
wooly, perennial, with soft linear involucral-bracts, Pappus of about 
fee bristles, with capillary men interposed. aneen hairs obtuse, 
` sometimes slightly and unequally toothed densata. 
é. Caulescent annuals or biennials with ET pubescence, perry 
olate involucral-bracts. 
* Pappus of disk plurisetose; achenes narrow-obov 
Erect; leaves spathulate, achene pubescent ti acute or 
1-a ote 
Parryi. 
hai 
báin leaves narrow, ray-pappus of short scales; vce has 
glochidiate. . Tigre 
** Pappus of 2 subulate, chaff-like bristles rising from a crown wn of short 
scales; achenes broad-obovate, glabrous, but with a few stout sais y 
airs. 
B. Involucral-bracts slightly or not acuminate; heads smaller or nartowel 
ê apoa airs glochidiate, their tips usually recurving. ! 
pad about 3 inch broad, sessile. Leaves breed eee gh 
5. 
Plants silky or strigulos 
thulate, contol 
Mier atthe leaves linear or ators spa 
the head; involucral bracts mostly qs 
Depressed sub- sta, leaves sant yo (% = p ava 
the hemispherical head; involucral-bracts mostly obtuse. 
e ispheri ead; inv a = 
Depressed caulescent or sub-caulescent; leaves narrow 
linear, the upper ones supporting the head ; wages : 
somewhat obtuse; pappus of ray much shorter than ve pres 
wool 
*** Heads about 1% inch broad, sessile; leaves pope: Saab 
-bristl lesci base into a ring, and falling 2 
pappus-bristles coalescing at base into a ring, A Td pist 
*#x* Heads & inch broad, hemispherical, usually er foe 
lucral-bracts broad-lanceolate, slightly acute. 
+ Leaves and involucre glabrous, the leaves thickish, spath 
sine slightly exceeding the pedun ncle. 
tf Fine cence; ray-pappus a crown of short sles 
setze being often added. 
te 
t Leaves linear ; involucral-bracts 3- -seriate, unequal, ts 
short (214mm), ots 
or Head ah eo ke -\% inch broad, usually sessile. 
Leaves spathulate below, upper ones linear. 
Involucral-bracts 2-seriate, rather broad, somew gi 
orter. 
