Pl.end.pL 22. ALISMACEiE. 155. Alisma. 21T 
Alpine lakes ; perennial ; July and August. 
Herb floating ; stem branched, leafy ; leaves alternate ; 
lower submersed, linear ; peduncles opposite to the leaves 
or terminal, 1 -flowered; flowers white. 
3. Alisma ranunculoides. Ranunculus water-plantain. 
Leaves linear, lanceolate ; etarions globose ; camares 
5-sided, incurved. 
Plantago aquatica minor, Raii Syn. 257,2; Park. 1245. 
Plantago aquatica humilis, Ger. etn. 417, 3. 
Alisma ranunculoides, Lin. S. P. 487. 
Dwarf water -plantain. 
Watery places ; perennial; August. 
Scape 12 in. high, upright, round; peduncles simple, ver- 
ticillate ; flowers pale, purple. 
0. repens. Stem decumbent, rooting. 
Alisma repens ? Davis Welsh Botanology. 
III. 156. DAMASONIUM. Dalechamp. Starhead. 
Perigonium 6-sepaled ; stamens 6 ; ovaries 6 or 8, joined 
at the base; camares 2-seeded; etarion stellate. — Leaves 
lanceolate or ovate; flowers umbelled, hermaphrodite. 
Damasonium Dalechampii . Dalechamp' s starheado 
Leaves cordate, oblong, obtuse ; etarion 6-rayed. 
Damasonium stellatum Dalechampii, Raii Syn. 272. 
Plantago aquatica minor stellata, Ger. em. 417, 2. 
Plantago aquatica minor muricata. Park. 1245. 
Alisma Damasonium, Lin. S. P. 486. 
Damasonium stellatum, Pers. Syn. 1,400. 
Star-headed, water -plantain. 
Bogs and stagnant waters ; perennial ; June and July. 
Scape 9 in. high, round, verticillately spiked ; flowers 
white. 
Fam. XVIII. 23. BUTOMACE.E. Richard. Alisma, 
cearum pars , De Candolle. Juncorum pars, 
Jussieu. Tripet aloidearum genus , Linnaeus. 
Perigonium nearly petaloid, 6-sepaled; stamens 9 or 
many; ovaries many, free, 1-celled, many-seeded; styles 
and stigmata many; pericarp many-seeded; seeds on the 
netlike veins on the sides of the valves, ascending; peri- 
sperm 0; corculum straight or bent like a horseshoe! — Plant 
aquatic, stemless; leaves ribbed lengthways; footstalks 
sheathing ; foliation involute ; flowers umbelled, terminal ; 
practece sheathing, at the base of the peduncles. 
