OBSERVATIONS ON THE CULTURE, &c. OF THE GENUS ISOPOGON. 259 
I. attenuates. — This species was introduced in 1822 ; its flowers are pale rose- 
colour, and are produced abundantly in spring. — A native of New Holland. 
I. axillaris. — The flowers of this species are a pinkish-white and produced in 
axillary heads, an exception to the genus ; the plant is of free growth, and was 
introduced, from New Holland, in 1822. 
I. Baxteri. — A handsome species. Seeds of it were sent from New T Holland to 
the Botanic Garden, Edinburgh, 1830, by Col. Lindesay. The cone of bloom is of 
a rich rose-colour, and covered with downy white hairs. 
I. corniger. — A recent introduction from Swan River, said to be a very pretty 
species, but has at present found its way into few collections. 
I. ceratophyllus. — From New Holland, introduced in 1824. Its flowers are pro- 
duced in terminal heads, in the spring months, and are nearly colourless. 
I. divaricates. — Flowers pale yellow ; bush low and spreading. — New South Wales. 
Introduced about 1800. 
I.formosus. — Perhaps the most beautiful of the genus ; it was introduced to Kew 
in 1805. It remained, however, until a few years ago, almost unknown in British 
collections ; until Mr. Baxter found it growing in the neighbourhood of Lucky Bay, 
in New Holland, and sent seeds of it to Mr. Mackay. The leaves are very much 
divided, and the heads of flowers purple. 
I. longifolius. — Flowers yellow, collected in a globose head. — Native of the 
southern parts of New Holland. It was introduced in 1820. 
I. Loudoni. — This is both rare and handsome ; possibly its flowers are more hand- 
some than those of any other species. It was discovered by Mr. Baxter, in 1829, 
in King George's Sound. Flower-head rich purple. 
I. polycephalus. — The flowers of this species are white, and, as its name indicates, 
are collected in many heads ; it flowers in the spring months, and is a very pretty 
kind. It was introduced, from New Holland, in 1 824. 
I. propinquus. — Flowers are pinkish- white, and are produced in spring. Seeds of 
it were sent from New Holland in 1823. 
I. roseus is very handsome ; it was raised by Eobt. Mangles, Esq., of Sunning 
Hill, from seeds imported from Swan River by Capt. James Mangles, in 1840. The 
leaves are three-lobed, and the flower-cones red purple. It is nearly allied to 
anemonefolius. 
I. scabra. — Of the whole twenty-three or four species of Isopogon which have 
been discovered, scabra must be ranked as one of the handsomest. The heads or 
cones of bloom are large, purple, or deep rose. It was introduced in 1841, by 
Mr. James Drummond, from the Swan River. See Mag. Bot., vol. x., p. 213. 
I. spathidatus. — Discovered by Mr. Baxter in King George's Sound. The flowers 
are rose-coloured, crowded together at the extremities of the branchlets, and are less 
conspicuous than some of the other species. It was introduced in 1836. A variety 
also, which has been named linearis, but of more slender growth than the species, 
has been discovered, and sent to this country by Mr. Baxter. 
