294 
74. CALLITEICHACE^. 75. TRTICACEJE. 
1, 4-angled, 4-celled. Styles 2, subulate. Fr. dry, 4-celled, 4- 
lobed; separating into 4 1-seeded indehiscent cai-pels. Em- 
bryo in axis of fleshy albumen. Radicle superior, long. Coty- 
ledons short, terete. — Only one genus of aquatic plants. 
1. Callit'riche Linn, "Water Starwort. 
1. C. ver'na (L.) ; fr. nearly sessile, lobes parallel in pairs 
bluntly keeled on the back, stj'les erect deciduous, bracts sti-aigntish 
deciduous. — E. B. 722. It. v. 129. — Lower 1. linear; floating 1. 
ovate-spathulate, in a rosette, rarely wanting. Fr. smaU ; keels 
of each pair of lobes converging. — Common in ponds and slow 
streams. A. or P. IV.— IX. E. S. I. 
2. C. platycar'pa (Kiitz.); fr. nearly sessile, lobes parallel in 
pairs slighth/ winged on the back, styles erect in flower persistent 
and reflexed closely with fruit, bracts falcate persistent. — JE. B. S. 
2864. B. V. 129. — Lower I. of st. and branches linear ; floating 1. 
round-obovate-spathulate, in a close rosette, often wanting. Fr. 
twice as large as that of C. verna, pale when dry. — ^. C. stag- 
nalis ( Scop.) ; lobes of fr. more spreading, I. all roundly obovate- 
spathulate. — Common, especially on mud. A. or P. V. — IX. 
E. S. I. 
-3. C. hamuldta (Kiitz.) ; fr. nearly sessile or stalked, lobes 
parallel iu pairs bluntly keeled on the back, styles divaricate and 
reflexed over the sides of the fruit, bracts falcate very deciduous. 
— B. V. 130.— L. linear; upper ones broader in the middle; 
uppermost ovate-spathulate. Bracts hooked, overlapping, per- 
haps confined to the male flowers. Fr. small, the size of that 
of C. verna. — (3. C. jieduneulata (DC.) ; 1. linear, upper 1. rather 
broader, fr. stalked. Plant usually very small. E. B. S. 2606. 
— Lakes and streams. ^. Marshes. A. or P. VI. — IX. E. S. I. 
4. C. atittcmndlis (L.) ; fr. nearly sessile, lobes spreading in a 
star broadly ajid acutely winged at the back, styles spreading, 
bracts 0, 1. all linear and broadest at the base. — -E". B. S. 2732. — 
Fr. 4 times as large as in C. verna, dark brown, 1 or 2 of the lobes 
often abortive. L. dark gi-een, all submersed, very abrupt at the 
end. — Rare. Anglesea. Several Scottish lakes. Cong, Mavo. 
A. or P. VI.— IX. E. S: I. 
Order LXXV. IJRTICACE.E. 
Fl. monoecious, dioecious, or rarely perfect. Perianth inferior, 
4 — 3 — 6-parted, imbricate ; or entire in tlie female flowers. Stam. 
definite, free, inserted at the base of the perianth and oppcsite to 
its lobes. Ovary free, 1-celled ; ovules solitary. Stignuis 1 — 2. 
Fr. not bursting.— See G. F. G. Monochl. 28, 29, 30. 
