MONANDRIA. DIGYNIA. Calliteiche. 
7 
Stems feeble, numerous, (thread-shaped, floating, or inundated. E.) BIoss. 
small, white, (axillary. E.) Upper leaves growing near together in form 
of a star; lower ones in pairs. ( Leaves triple-ribbed. Sm. E.) 
Vernal Stargrass. Water Starwort. Water Fennel. Star¬ 
headed Water Chickweed. (Welsh: Brigwlydd. gwanwynaivl. E.) 
C. aquatica. FI. Brit. Hook. FI. Lond. and Scot. Hitches, ponds, and 
slow streams, frequent. Apr.—May. 
Var. 2. Leaves oblong. Flowers either stameniferous, pistilliferous, or 
perfect. 
Ger. 830. 3 —Park. 1258. 10— Pet. 6. 3. 
Barren and fertile flowers frequently opposite each other, on different sides 
of the stem, in the bosom of the corresponding leaves. Mr. Wood. All 
the leaves sessile. Lower leaves spear-shaped, opposite, distant. Upper 
leaves slightly notched at the end. Fertile flowers in the bosom of the 
lower leaves; barren ones amongst the upper leaves, which are crowded 
together. Petals thick, flat, bowed inwards at the edge like a crescent. 
When magnified they appear to be a collection of air-vessels, and are 
undoubtedly intended to float the flower. 
In ditches and still waters, frequent. A. Apr.—May. 
Var, 3. All the leaves roundish, on leaf-stalks, very entire, in pairs, except 
the lower ones. Hall. 553. 
FL Dan. 129— J. B. iii. 786. 2— Park. 1263. 2— Fructification. Vaill. 32. 10- 
Var. 4. Leaves egg-shaped. Stamens and pistils variously disposed. 
Scop. 
Col. Ecphr. 316. 
In places where water, that stood during the winter, has been dried up. 
C. autumna'lis. All the leaves strap-shaped, cloven at the end. 
Flowers perfect. 
Pet. 6. 4— Gmel. iii. 1. 2. 
Leaves oblong. Stamens and pistils in different plants. Scop. BIoss. yel¬ 
lowish white. ( Leaves single-ribbed; more membranous, and much more 
minutely cellular, of a rich deep, permanent green. Sm. E.) 
Autumnal Stargrass. (Welsh : Brigwlydd cynaufaw. E.) C. aquatica y. 
Huds. Ditches and still waters frequent. FI. Brit. A. Sept.* 
Star-grass sometimes grows so thickly matted together as to allow a person 
to walk upon it without sinking. 
* (Respecting the species of Callitriche, the best authorities differ in opinion. Dr. Sib- 
thorpe assures us that C. verna , cultivated in the Oxford garden, changed into C. autum- 
nalis ; and the learned P. L. S. included both in his FI. Brit, under Hudson’s name of 
C. aptalira. Professor Hooker also cons : ders the distinctions as fi by no means constant: 
but in a still more recent publication, Sir J. E. Smith has restored the two species, lhat 
in certain states of either there is an obvious difference cannot be doubted ; yet may it not 
appear that the strap-shaped leaves of the submersed plants, on emerging, generally 
approximate the oval form ? E.) 
