SOME MINOR GENERA 309 
duced from North-West America in 1865. Propagation by seed, sown in 
pots, and germinated in a warm frame. 
Srevia (named in honour of Professor Peter J. Esteve, of Valencia, 
eee Florets all tubular, white or purplish, five-cleft, five ina 
; heads in corymbsor panicles. Principal species: Stevia Hupatoria 
(1896) and S. ovata (1816), both with white flower-heads; S. purpurea 
(1812), with purple, and S. serrata (1827), with white or pink, flower- 
heads. These perennials from Mexico flower in August, and do well as 
border plants in summer, but in winter they require slight protection, 
such as a cool greenhouse or frame. They are propagated alike by seeds, 
cuttings, and divisions. By the use of seeds they may be treated as 
annuals, if sown on a hot-bed in March. 
Liatris. Florets all tubular, long, with free slender extremities, 
white or purplish. Involucre cylindrical, the bracts closely overlapping. 
Flower-heads in spikes, racemes, or panicles. Principal species: Liatris 
pycnostachya (1732), with pale purple heads in dense spikes, over a foot 
long, and long slender leaves; L. spicata (1732), of smaller stature, with 
purple heads, in spikes from 6 inches to a foot long, and long lance-shaped 
leaves. These North American plants are perennials, but they are better 
treated as biennials, sowing the seeds in spring on light soil. 
CuarieEis (Greek, graceful, elegant). The only species is a hardy 
annual from the Cape, also known as Kawlfussia amelloides. Charieis 
heterophylla has oblong-lance-shaped leaves and flower-heads entirely 
blue, or with blue rays and yellow disk, flowering in June. It thrives 
in ordinary soil, and seed should be sown in April where intended to 
flower ; or in March on heat. Introduced 1819. 
ANTENNARIA (from resemblance between the antenne or feelers of 
insects and the pappus of the male florets). Principally cultivated, on 
account of their silvery woolly leaves, for use as border edgings. Heads 
surrounded by numerous everlasting bracts, as long as the florets, and in 
several series. The male and female florets occur on different plants; 
the former are tubular, dilated at the mouth, the female thread-like. 
The principal species is Antennaria margaritacea, or Pearly Everlasting, 
a plant supposed to have been introduced from North America in the six- 
teenth century, but now naturalised in parts of Britain. Its branching stem 
is about 2 feet high, clothed with leaves, the under-side of which is white 
- with dense cotton. Heads one-third of an inch across, white, in compound 
corymbs; July and August. A. tomentosa is an exceedingly dwarf 
species, not more than an inch high. The flower-heads are dried as soon 
11.—37 
