DAMASONIUM. ALISMACEJE (AUCT. M. MICHELI). 43 
G, compacta. (D. Bourgæi Coss. l. c.) humilior, flores in quoque ver- 
ticillo 15-18; pedicelli breviores 10-15 mill. longi; carpella minora, 
brevius rostrata, costis magis prominentibus. 
In fossis, stagnis Europe praecipue occidentalis et meridionalis, 
Africæ borealis nec non Asis centralis; 1° in Europa, in Anglia (non 
Scottia nec Hibernia), Gallia præcipue occidentali et centrali, rarius 
orientali, Hispania et Lusitania, in tota Italia, Sicilia, Sardinia ; non 
reperitur in Grecia; in Europa centrali dubium (specimen unicum 
ex vieinibus Berol. in herb. Kew); in Rossia a provinciis Caucasicis, 
usque ad Moscam; 2° in Africa, in imperio Maroceano (Ball Spicil.), 
Algeria passim (in herb. Mus. Par. Kew. Cand., etc., et Mumby Cat.), 
Mauritania, Ægypto (Schimper in herb. Cand., etc.); 3° in Asia, in 
Syria prope Damas (Labillardière in herb. Del.), in Persia prope mare 
Caspium (Kunth et Ledeb. 1. c.), in regione Kirghizorum (herb. 
Petrop.). Var. 6 in Hispania, Lusitania et Africa boreali. 
2, D. polyspermum (Coss. Notes sur q. pl. nouv. ou crit. du 
sud de l'Esp. 1849, p. 47); humile, scapo simplici; paucifloro, floribus 
parvis, earpellis 6-9 polyspermis. D. minimum Lange Pug. plant. 
imprim. hispan. 1860, I, p. 65? 
Herba humilis raro 7-8 cent. excedens, spe vix 2-3 cent. alta, 
annua, radicibus fibrosis. Folia omnia radicalia, oblonga vel lanceolata, 
utrinque plus minusve aeuta, membranacea, 20-30 mill. longa, 5-8 
mill. lata, 3-5 nervia, nervis secundariis paucis. Petioli complanati, 
striati, basi dilatato-amplectentes, 4-5 cent. longi. Scapi sæpius plu- 
res, folia æquantes vel iisdem breviores, striati; flores umbellati vel 
rarius biumbellati, pauci (sæpius 3-5), longe pedicellati, pedicellis 
20-30 mill. longis. Bracteæ exteriores 3 scariosæ, 4 mill. longze. Sepala 
late ovata, 3 mill. longa. Petala fugacia. Ovaria 6-8 stylo brevi, recto ; 
ovula numero variabilia a 8-10 usque at 15-20, inferiora micropyle 
introrsa, superiora autem extrorsa. Carpella 10-12 mill. longa, late- 
raliter vix costata, sensim et longe acuminata nec rostrata. Semina 
minima, vix 1 mill. longa, inferiora ad basim congesta, superiora 
secundum suturam ventralem regulariter disposita; testa cristata. 
In humidis Galliæ meridionalis et Hispaniæ : Mares de Rigaud 
prope Agde, Hérault (Aubouy, ete.); in stagno prope Puerto-Santa- 
Maria in agro Gaditano (Bourgeau n. 459); in stagnis exsiccatis 
prope Escorial (D. minimum Lange). 
3. D. australe (Salisb. Hortic. Transact. 1, p. 268) gracile, 
