556 338. Callitriche. 55. HALORAGE^. PL ex. cal. 



(3. intermedia. Lower stem-leaves and branch-leaves 

 linear, 2-nicked at the tip. 



Callitriche verna ;S, Lin. FL Sitec. 3. 

 Callitriche intermedia, Hoffm. Germ. 1791,2, 

 Callitriche dubia. Roth FL Germ. 1, 389. 

 Callitriche aquatica /3, Willdenoiv Hort. Berl. 1,8. 

 Callitriche autumnalis, Schkuhr But. Handh. 1, 8. 



y. ccespitosa. Leaves linear, rather obtuse ; stem lying 

 on the ground. 



Stellaria minor et repens. Rail ,^yn, 289, 1 ? 

 Lenticula aquatica bifolia Neapolitana, Park. 1263 ? 

 Alsine palustris serpyllifolia, Ger.em. 614, 12. 

 Callitriche aquatica jS, Smith FL Brit. 9. 

 Callitriche minima, Hoppe Bot. Tasch. 1792, 155. 

 Callitriche ciEspitosa, Sclimid FL Stutgard, 25, 

 Callitriche aquatica 8, fVilld. Hort. Ber, 1,8. 



Sandy places, dried up ponds. 



2. Callitriche virens. Gree?! water-stanvort. 



Jjcaves uniform, equidistant ; fruit membranaceously 

 winged. 



Stellaria aquatica foliis loiigis, tenuissimis, Rati Sj/n. 290, 3. 



Callitriche autumnalis, L?n. S. P. 6. 



Callitriche angustifolia, Hoppe Bot. Ihsch. 1792, 155. 



Callitriche aquatica, Willd. Hort. BerL 1 , 8. 



Callitriche aquatica y, Smith FL Brit. 9- 



Ponds and ditches; annual; April to October. 

 Plant sunk ; leaves linear, nicked ; fiowers all herma- 

 phrodite. 



II. 339. HIPPURIS. Dioscorides. Mares-tail. 



Flowers hermaphrodite ; calyx not divided, very small ; 

 corolla ; stamen 1 ; sti/le in the furrow of the anther ; 

 ovary 1-celled, crowned with the calyx and style ; peri- 

 sperm fleshy, thin. — Stem simple; Zeoi'^j in whirls, linear ; 

 powers axillary, solitary, whirled. 



Hippuris vulgaris. Common mares-tail. 



Leaves in whirls of 10 or 12, linear, pointed. 



Limnopeuce, Rail Syn. 136, I, 

 Cauda equina foemina, Ger. em, 11 14, 6. 

 Hippuris vulgaris, Lin. S. P. 6. 

 Female horse-tail. 



Rills and Stagnant waters; perennial; May. 

 Root fibrous ; stem erect, jointed, leafy above ; leaves 

 spreading, not in the least cut; jlowers sessile. 



|3. demersa. Leaves very long, pellucid, pale, slender. 



Limnopeuce q. Equisetum palustre linurioc scopariai folio, Dillen in 

 Rati Syn. 136, 1 ». 



