:$72 74. CALLITRICHACE^l. 



2. C. obtusan'gula (Le G.) ; fr. nearly sessile, lobes parallel 

 with rounded edges, styles erect or spreading persistent, bracts 

 persistent. L. all obovate, in a rosette. Fr. large, quite blunt 

 and rounded at the edges. Ditches. A. or P. V. IX. E. I. 



3. C. polymorplia (Lonnr.) ; fr. nearly sessile, its lobes keeled 

 not winged; styles erect in fl. persistent and reflexed in fr. very 

 long, bracts falcate persistent. Upper 1. rosulate, roundly 

 spathulate, lower 1. linear eraarginate. Fr. about as long as in 

 Sp. 1. Style 2 3 times as long as fr. Much resembles Sp. 4 

 but fr. smaller and scarcely winged. Recorded from Surrey and 

 Shetland. A. or P. VL IX. E. S. 



4. C. stag'nalis (Scop.) ; fr. nearly sessile, lobes winged on the 

 back, styles erect in flower persistent and reflexed closely witlji 

 fruit, bracts falcate persistent. E. B. S. 2864. All 1. round- 

 obovate-spathulate, floating-1. in a close rosette, often wanting. 

 Fr. twice as large as in Sp. 1, pale when dry ; lobes slightly 

 spreading. Common, especially on mud. A. or P. V. IX. 



E. S. I. 



5. C. intermedia (Hoffm.) ; fr. broader than long nearly ses- 

 sile or stalked, lobes parallel with a blunt dorsal ridge flat on the 

 sides, styles divaricate and reflexed over the sides of the fruit, 

 bracts falcate very deciduous. R. v. 130. Sy. E. B. 1273. 

 C. hamuldta (Kiitz.) ed. viii. L. linear ; upper ones broader in 

 the middle; uppermost oblong spathulate. Bracts hooked, 

 overlapping, soon falling. Fr. small, the size of that of C. vernalis. 

 j8. C. pedunculata (DC.) ; 1. linear, upper 1. rather broader, 

 fr. stalked. Plant usually very small. Lakes and streams. /3. 

 Marshes. A. or P. IV. IX, E.S.I. 



B. L. uniform, enlarged at the base, linear. Fr. of 4 

 nearly free lobes. C. autumnalis L. 



6. C. truncdta (Guss.) ; fr. shortly stalked, lobes with a blunt 

 dorsal ridge, styles reflexed-patent, bracts 0. C. autumnalis 

 Hook, (not L.). E. B. S. 2606. L. all submersed, uniform, 

 very abrupt at the end, translucent green. Suss., Kent, Wex- 

 ford, Guernsey. A. or P. IV. IX. E. I. 



7. C. autumnalis (L.) ; fr. nearly sessile, lobes broadly and 

 acutely winged at the back, styles spreading, bracts 0. E. B. S. 

 2732. Fr. 4 times as large as in C. vernalis, dark brown, 1 or 2 

 of the lobes often abortive. L. dark green, all submersed, very 

 abrupt at the end. Rare. Anglesea. N. of England. Scotland. 

 N. & W. of Ireland. A. or P. VI. IX. E. S. I. 



