ASTER IOSTEMMA 361 
* Inflorescence somewhat deeply branched, rather regular and 
convex-topped. Sp. 66-60. 
f Violet of the rays often almost blue, but evanescent and 
quickly becoming white; the same plant therefore often showing 
blue-violet heads and white heads at once. Sp. 66, 67. 
66. Aster iostemma sp. nov. 
Tall strong plants with smooth brown stem, granular-rough- 
ened elongate leaves, crenate-serrate or subentire margins, and pro- 
longed cordate-oblong radicals ; the characteristic caulines ovate- 
acuminate with truncate and rounded base and taper-wing petiole, 
broad irregularly-compound high-angled inflorescence, the outside 
and lowermost heads successively flowering, the young dark blue- 
violet rays and the older white rays simultaneous in bloom side by 
side. 
Name, Gr., = violet-crown, this s iet representing an extreme case of the 
dark violet rays docui among some Janthine aster: 
Fic. 88, plant from Little-Indian Cr. Te Y., Au. 24, 95, in hb Jas $, 
characteristic cauline leaf-form ; c, AEROS ilicis; d, less developed radicals. 
Stem terete, erect but with continuous slight flexures, with 
long internodes, sometimes 41% ft. tall 
Radicals 2, 3, or often 4, unusually long and narrow, glabrate 
and chiefly very smooth in life, still smooth or partly granular- 
roughened when dry ; cordate-oblong, and straight-sided, 9 x 4% 
in. with equal petiole; or in less pronounced development much 
incurved toward the apex, short-scutiform and 5 x 4 in. or long- 
scutiform and 8 x 4 in.; their teeth low-curvescent with but 
slight aculeus, but with their sinuses somewhat excavated. Peti- 
oles slender and smooth ; even 13 in. long sometimes. Surface 
sometimes almost as unctuous as in A. macrophyllus pinguifolius. 
Sinus E and open, usually shallow and producing a recurving 
brace-bas 
Caifas of ovate type, serrulate, at first with truncate i 
base ; then rounded into a truncate base without cordation, and 
with ' short, cuneate wing, these being its most etarik 
caulines. Axiles follow which are ovate-lanceolate, longer acumi- 
nate, with irregular wing, finally almost sessile 
eins darker above than the full-green leaf, paler below than 
the pale-green tissue surrounding, few, strongly upcurve 
Leaf-substance firm, only moderately thick, highly roughened 
above, somewhat so beneath when dry: Weak pale strigose hairs 
cover the veins beneath. 
