Plend.ph. 22. ALISMACE^. 155. Allsma. 217 



Alpine lakes ; perennial ; July and August. 



Herb floating ; stem branched, leafy ; leaves alternate ; 

 lower submersed, linear ; peduncles opposite to the leaves 

 or terminal, 1-flovvered; ^o if er^ white. 



3. Alisma ranuncidoides. Rammcidus ivater-plmitain. 



Leaves linear, lanceolate ; eturions globose ; camares 

 5-sided, incurved. 



Piantago aquatica minor. Rail Syn. 257,2 5 Park. 1245. 

 Plantago aquasica humilis, Ger, em. 417, 3. 

 Ali^ina ranunculoides, Lin, S, P. 4S7. 

 Dioarf watir-plantain. 



Watery places ; perennial ; August. 

 Scape 12 in. high, upright, round; peduncles simple, ver- 

 ticillate ; flowers pale, purple. 



/3. 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. 



Damason'mm Dalechampii. Daleckamp's starhead. 



Leaves cordate, oblong, obtuse ; etarion 6-rayed. 



Damasoiiiviin stella(!im Dalechampii, Rctii Syn. 272. 

 Planiago aquatica minor ste'.'ata, Ger. em. 417, 2. 

 Plantaao aquaiica minor mnricata, Park. 1245. 

 Alisma Dainasotiiuin, im. S. P. 486. 

 Damasonium sleilatum, Pei-A. .S'^n, 1,400. 

 Star-headed icater-plantain. 



Bogs and stagnant waters; perennial; June and July. 

 Sca.pe 9 in. high, round, verticillately spiked ; flowers 

 white. 



Fam. XVIII. 23. BUTOMACE.^. Richard. AUsma- 

 cearum pars, De Candolle. Juncorum pars, 

 Jussieu. Tripetaloidearum gejius, Linnteus. 

 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 ; foliaiion involute; flowers umbelled, terminal; 

 hractece sheathing, at the base of the peduncles. 



