288 THE PRIMROSE FAMILY. — 
Stamens and divisions of the flowerin fours . ‘ ’ . 8. CENTUNCULUS. : 
Stamens and divisions of the flower in fives. Jp 
No corolla. Calyx pinkish . ; , : ; : - 6: "GLAU: 
Both calyx and corolla. 
Capsule opening at the top. Flowers yellow . ‘ . 4, LYSIMACHIA, 
Capsule opening transversely. Flowers blue or red 7. ANAGALLIS. 
Leaves alternate or radical, or the upper ones irregularly whor led. 
Flowers terminal. 
Leaves all radical. Flowers solitary or umbellate, on radical 
peduncles, Tube of the corolla distinct. 
Tube of the corolla cylindrical, lobes spreading. Notubers. 2. PRIMULA. 
Tube of the corolla nearly etn lobes reflexed. Root- 
stock tuberous . : - f : : : . & CYCLAMEN, 
Stem leafy. 
Leaves*in one terminal whorl, with a few alternate ones 
below. Peduncles few, terminal, 1-flowered. Corolla 
rotate - : ; : ; - ; : . 5, TRIENTALIS. 
Leaves all alternate. Flowers small, white, in a terminal . 
raceme. : ‘ ‘ ‘ , ‘ : : p » 9, SAMOLUS. 
The Dodecatheon, or American Cowslip, of our gardens, belongs also to 
Primulacee. The allied family of Myrsinacew, mentioned above, is com- 
monly represented in our greenhouses by a species of Ardisia. 
I. HOTTONIA. HOTTONIA. 
Aquatic herbs, with submerged, pinnatifid leaves, and flowers in whorls 
forming a terminal raceme ; differing from Primula in the more deeply 
divided calyx, and inthe capsule, which opens by lateral slits instead of 
terminal teeth. 
Besides our own species, the genus only comprises a single North 
American one. 
1, H. palustris, Linn. (fig. 649). Water Violet, Featherfoil.—Stock 
perennial and creeping, with whorled leafy branches entirely sub- 
merged ; the leaves alternate and deeply pinnatifid, with narrow-linear 
lobes. From the centre of the whorl a single, erect, leafless flower-stem 
arises out of the water, bearing at intervals whorls of from 3 to 5 or 
6 handsome, pale-purple flowers, on short pedicels, each with a small 
bract at its base. Calyx of 5 deep, linear divisions. Corolla with a 
straight tube, rather shorter or scarcely longer than the calyx, and a 
broad, 5- lobed limb. 
In pools and channels, in central and northern Kurope, but not extend- 
ing to the Arctic Circle. Very local in western England, more common 
in the central and eastern districts; in Ireland, County Down only, and 
not found in Scotland. Fl. early summer. 
II, PRIMULA. PRIMROSE. 
Herbs, with radical leaves ; the flowers either solitary or in a terminal 
umbel, on leafless, radical peduncles. Calyx tubular or campanulate, 
with 5 teeth or lobes not reaching to the base. Corolla with a straight 
tube, and a spreading, 5-lobed limb, each lobe often notched or 2- cleft. 
Capsule opening at the top in 5 teeth. 
A genus widely spread in Europe and northern and central rene fl 
containing many alpine, especially Chinese and Himalayan species, 
with only two or three North American, and one in Antarctic America. : 
