Hottonia. | XLVI, PRIMULACE. 289 
Stamens and divisions of the flower in fours . : ‘ . 8. CENTUNCULUS, 
Stamens and divisions of the flower in fives. 
No corolla. Calyx pinkish . ? 4 F ‘ P « 6, GLAUX. 
Both calyx and corolla. 
Capsule opening at the top. Flowers yellow . é . 4. LysIMACHIA. 
Capsule opening transversely. Flowers blue or red . 7. ANAGALLIS. 
Leaves alternate or radical, ov the upper ones irregularly whorled, 
Flowers terminal. 
Leaves all radical. Flowers solitary or umbellate, on radical 
peduncles. Tube oft he corolla distinct. 
Tube of the corolla cylindrical, lobes spreading. Notubers. 2. PRIMULA. 
Tube of the corolla nearly globular, lobes reflexed. Root- 
stock tuberous . * : 3 , . . 3 CYCLAMEN. 
Stem leafy. . 
Leaves in one terminal whorl, with a few alternate ones 
ames Peduncles few, terminal, one-flowered. Corolla 
rotate. . : . ° ° : ° - ° ° 
Leaves all alternate. Flowers small, white, in a terminal 
raceme . . ° ‘ : 5 . - B. B34 . 9, SAMOLUS. 
The Dodecatheon, or American Cowslip, of our gardens, belongs also to 
Primulacee. The allied family of Ayrsinacee, mentioned above,is com- 
monly represented in our greenhouses by a species of Ardisia. 
I. HOTTONIA. HOTTONIA. 
Aquatic herbs, with submerged, pinnatifid leaves, and fiowers in whorls 
forming a terminal raceme; differing from Primula in the more deeply 
divided calyx, and in the 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. 647). Water Hottonia, Water Violet, 
Featherfoul.—Stock perennial and creeping, with whorled leafy branches 
entirely submerged; 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 
. male, rather shorter or scarcely longer than the calyx, and a broad, 5-lobed 
imb, 
In pools and channels, in central and northern Europe, 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. #7. early summer. 
5, TRIENTALIS. 
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 five teeth. 
A’ genus widely spread in Europe. and northern and central Asia, 
containing many Alpine species, one of which reappears in Antarctic 
America. 
Leaves rather large, wrinkled, light green, Lobes of the corolla 
slightly notched . ‘ : Co. : ‘ : ° . I. P. veris, 
U 
