




OF ORNAMENTAL EXOTIC PLANTS. 13 
almost in clusters. The flowers of most of the species are yellow, but some are white and some pink. The 
plants are generally of a much smaller size than those belonging to the genus Cistus, and their stems are 
usually trailing instead of being erect. The name of Helianthemum is from two Greek words signifying flower 
of the sun, because the petals of most of the species unfold when the sun rises, and drop before it sets in the 
evening. 
1—HELIANTHEMUM FORMOSUM Dun. THE BEAUTIFUL HELIANTHEMUM, OR SUN-ROSE. 
Synonyme.—Cistus formosus Sims. nescent. Leaves on short footstalks, obovate, lanceolate, tomentosely 
Encravines.—Bot. Mag., t. 264; and our jig. 3, in Pl. 3, under | villous, younger ones hoary. Peduncles and calyx villous. Calyx 
the name of Cistus formosus. of three sepals. 
Sprectric Cuaracter.—Erect. Branches tomentosely villous, ca- 
Description, &c.—This very beautiful plant is a native of Portugal, whence its seeds were introduced in 1780. 
It is very nearly hardy, and it may be grown in the open border all the year if it can be protected from the spring 
frosts ; but it flowers much better under cover, and particularly when it is grown in a pot, which may be done, even 
when the plant is three or four feet high, without its sustaining any injury. 
2.—HELIANTHEMUM ALGARVENSE Dun. THE ALGARVE HELIANTHEMUM. 
Synonyme.—Cistus Algarvensis Sims, lanceolate, obtuse, hoary on the under surface; upper surface green, 
Encravines.—Bot. Mag., t. 627; Sweet’s Cist., t. 40; and our | pilose. Peduncles somewhat panicled, pilose, Calyx of three sepals, 
Jig. 4, in Pl. 3, under the name of Cistus Algarvensis. acute, hairy. (G. Don.) 
Seeciric Cuaracter, —Stem branched. Leaves sessile, ovate- 
Description, &c.—This very pretty little plant is a native of Algarve, a province in the south-west of Portugal. 
The flowers are small, but very pretty, and they are produced in great abundance. The stem of the plant is 
trailing, and only the flower-stems raise themselves erect. The flowers appear in July and August, but they 
rarely ripen seed; therefore, the plant is generally propagated by cuttings. It is tolerably hardy, and may be 
grown on rockwork in the open air during summer. 
OTHER SPECIES OF HELIANTHEMUM. 

ANS 
These are very numerous, but very few of them are found in British gardens, and very often the same plant is 
known under seyeral different names. H. wmbellatum, with white flowers, and the flowers in a kind of umbel, 
and EH. candidum, with yellow flowers, and leaves covered with a white down, are perhaps among the most common. 
Almost all the kinds of Helianthemum ripen their seeds, and consequently new plants may be raised from 
them ; or cuttings of the ripe wood may be taken off in August and September, when they will strike readily. 
Nearly all the greenhouse species only require protection in the winter, and may be planted on rockwork during 
the summer months. 

GENUS III. 
HUDSONIA Lin. THE HUDSONTIA. 
Lin. Syst. POLYANDRIA MONOGYNIA. 
Generic Cuaractrer.—Petals five. Stamens from fifteen to thirty; | Capsule one-celled, three-valved, one to three-seeded, oblong or obo- 
filaments filiform; anthers small, longitudinally dehiscent. Style | vate, coriaceous, smooth or pubescent. Seeds granulated. Embryo 
straight, simple, equalling the stamens in length. Stigma simple. | immersed in a horny albumen. (G. Don.) 
Description, &c.—There are only five species belonging to this genus, two of which have been introduced. 
They are pretty little Heath-like plants with yellow flowers, natives of New J ersey and Virginia in North America; 



