208 
Composite. 
phrodite fl. deeply 2-fid at the top, with long, linear- 
lanceolate stigs. Fl. yellowish white.—Damp mountain 
woods; distrib. but not common. 4 albus Gartn. 1113. 
OBS. Pis almost dioecious, sometimes more fem., sometimes more her- 
maphr. Former botanists considered these 2 forms as distinct species.—Hybrids: 
P. albus-nivetis and P. niveus-o/Jicinalis. 
291. Linosyris. Linosyris. XIX, 46. 
1. Slem with many Is. Ls linear. FIs yellow. Chrysocoma 
Linosyris L. — Hills exposed to the sun; scattered (want¬ 
ing in U. L.). 8 vulgaris Cass. 1114. 
292. Aster. Aster. XIX, 77. 
1. Stem 1-headed. Heads large (35—50 mm in diam.).—b. 
Wolfii Favrat! Stem taller (20—25 cm); invol.-leaflets 
more acuto; ray-fls blue (instead of violet).*)—Alp. 
Jura: b. Sion ..... alpinus L. 1115. 
— Stem bearing several, or many, smaller heads . 2 
2. Invol.-leaflets entirely herbaceous. Stem30—40cm, with a 
short rough pubescence, as also the Is.—Hills exposed 
to the sun (wanting in U.). 6, 7 . Amellus L. 1116. 
— Invol.-leaflets herbaceous at the top, but bordered on 
both sides by a scarious edge, broader towards the 
base. Stem 00 —150 cm. Ornamental pis, chiefly from 
N.America, but naturalised here and there, especially 
on river-banks ........ 3 
3. Invol.-leaflets very lax, the outer ones spreading almost 
from the base. Caul, ls distinctly clasping at the base 4 
— Invol.-leaflets appressed-imbricate, only spreading slightly 
at their extremity. Caul, ls narrowed towards the base, 
not clasping ........ 5 
4. Stem terminated by a pyramidal-oblong raceme. Heads 
of medium size (about 30 mm in diam.), gen. solitary 
at the top of the branches. Ray fls blue. 9 
t brumalis Nees. 1117. 
— Stem terminated by a corymb-shaped raceme. Heads 
gen. arranged in a raceme or corymb on the branches. 
Ray fls reddish-violet. 9 . . f novi Belgii L. 1118. 
5. Invol.-leaflets about equal in length, the outer about 
as long as the inner. Heads fairly large. A. salignus 
Willd. 8. f salicifolius Scholl. 1119. 
— Invol.-leaflets uneq-ual in length, the outer only half as 
long as the inner, or still shorter. Heads the smallest 
of the genus. 8 . . . f parviflorus Nees. 1120. 
*) Another form is : A. Garibaldii Brligg. Size, habit and form of 
Is of 1115, but stem branched, bearing 2—7 heads which are much smaller. 
Above Bormio. 
