CHARA. 543 



stipulodes prominent) bracts wliorled nearly equal exceeding the 

 ovoid nucules of 13 spires and spreading crown. E. B. S. 2738. 

 Small, in dense masses. Sometimes with smooth bulbils on 

 lower nodes. Length and number of spines variable. Inter- 

 nodes very long. [/3. capillata (Braun) ; spine-cells many very long, 

 plant usually bright clear green. y. subinermis (Kuetz.) ; spine-cells very 

 few and inconspicuous, much shorter than in the type. 8. lacustris 

 (H. & J. G.) ; much smaller 1 4 in. high, hranchl. short stout incurved, 

 spine-cells papillate. Subsp. desmacantha (H. & J. G.) ; st. usually 

 thicker, cortex imperfectly 3-ranked, spine-cells fascicled instead of 

 solitary.] Lakes and pools. VII. VIII. E. S. I. 



11. C. connivens (Braun) ; dioecious, st. slender brittle without 

 spines, branchlets usually 8 strongly incurved, stipulodes scarcely 

 visible, bracts much falling short of nucules scarcely apparent 

 except with them, nucules small ovoid with 12 14 spires and 

 conical crown. J. of B. xviii. t. 207. Light green. 12 inches 

 high. Rare. In south [and east] of England. [Wexford.] 

 VII. VIII. E. I. 



12. C. frag' His (Desv.) ; monoecious, st. slender finely striate 

 no spines, branchlets 6 9 of 7 9 joints the upper 1 3 joints 

 not coated, lower stipulodes very short, bracts usually 4 usually 

 about equalling the ovoid nucules of 12 14 spires and 

 rather conical crown. C. pulchella E. B. S. 2824. Slender, 

 green, usually not incrusted. Very variable. [A. Primary 

 cortical cells not more prominent than the secondary.] ft. lied- 

 wigii (Ag.) ; stronger and larger with very short bracts. 

 E. B. S. 2762. y. fulcrata (Gant.) ; bracts shorter than the 

 nucules, stip. obsolete. [8. capillacea (Thuill.) ; whole plant very 

 slender, branchlets spreading. e. Sturroclcii (H. & J. G.) ; cortication 

 irregular, branchlets ecorticate. Possibly a hybrid. B. Subsp. delicatula 

 (Braun) ; primary cortical cells more prominent than the secondary, t. 

 small, branchlets usually connivent. rj. barbata (Gant.) ; bracts and 

 stipulodes much longer.] 0. C. verrucosa (Itz.) ; small, 24 in. 

 high [with conical spine-cells], often with compound bulbils at base. 

 Slow and stagnant waters, [e. Monk Myre, E. Perth. Mr. A. 

 SturrocJc.} VI. VIII. E. S. L 



13. C.fragif'era (Dur.) ; dioecious, st. very finely striate no- 

 spines, branchlets slender 6 9 of many joints upper joints not 

 coated, stipulodes very small, bracts 3 5 half as long as nucule 

 very short with globule, nucules ovoid of 11 13 spires and 

 short blunt crown. J. of B. xv. t. 192. Often flexible and ex- 

 ceedingly slender, 6 12 inches long, bright green, not incrusted. 

 bearing large compound bulbils at its base. West of Cornwall 

 in pools. VII. VIII. E. 



