t 



Actinocdrpus.l xcix, alismace^. 469 



1. E. umbelldtus L. (common F.) ; leaves linear-subulate tri- 

 gonous, spatha of 3 leaves. E. B, t. 651. 



■ 



Ditches and ponds, frequent in England and Ireland. Duddingston 

 Loch, and Loch of Clunie, Scotland, but only where it has been 

 planted, li/.. 6, 7. — Rhizoma white. Leaves all radical, 2 — 3 feet 

 long, linear, acuminate, acutely trigonous, more or less spirally 

 t twisted at the extremity. Scape longer than the leaves^ rounded. 



C/mfie/ofmany rose-coloured ^otf;cr5, on pedicels about 4 inches long, 

 with scariose sheathing hracteas at the base, and these having a tri- 

 phy lions membranous spatha or involucre beneath them. Germens 

 ovate, compressed, rostrate. Style about as long as the germen, re- 

 curved at the apex ; stigma lateral. Seeds parietal, or fixed to the inner 

 surface of the pericarp, extremely small, A highly ornamental plant. 



» 



f 



r«r 



t. 



Obd. XCIX. ALISMACE^ B. Brown. 



Perianth of 6 pieces ; 3 outer sepals herbaceous, 3 inner peta- 



bid. Stamens hypogynous. Ovaries several, superior, distinct 



or slightly united at the base, each 1 -celled. Ovules solitary^ 



or 2 superposed, attached to the inner angle of the carpel. 



Pericarps indehiscent. Seeds solitary, or 2 attached to the 



suture at a distance from each other, erect or ascending. Al" 



lumen 0. Embryo undivided, curved like a horse-shoe, with 



the same direction as the seed. — Aquatics. Leaves radical on 

 long stalks. 



1. AcTmocARPus. Flowers perfect. Stam. 6. Carpels 6—8, spreading^ 



each 2-seeded. 



2. Alisma. Flowers perfect. Stam, 6. Carpels numerous, each 1- 



seeded. 



3.^ Sagittakia. Flowers monoecious. Stam. numerous. Carpels nume- 

 rous, each 1- seeded. 



1. AoTiNocAKPUS Br. Star-fruit. 



-F/owers perfect. Stamens 6. Styles 6—8. Capsules Inde- 

 liisccnt, combined at the base, spreading in a radiated manner, 

 2-seeded.— Named from a/c^^)^, a ray, and Kap~oc^ a fruit; m 

 reference to its curiously radiated fruit, resembling a star-Jish. 



1. A. Damasonium Br. (common S.) ; capsules 6 subulate 

 eompressed opening longitudinally, leaves 5-nerved. Alisma 

 Damasonium L. : E. B. t. 1615. 



Ditches and pools, mostly on a gravelly soil, and chiefly in the 

 middle and south-eastern counties of England. 2^. 6, 7. — Leaves 

 radical, on long petioles, floating, elliptical. Scapes with a terminal 



