I 



Echinodorus. 27 



lamina lineari-lanceolata, rarius lanceolata, utrinque acutata, coriacea, 3- usque 5-nervia, 

 [ilnumque 5 usque 10 (raro 20) cm longa et 3 usque 5 (raro 20) mm lata; lineae 

 pellucidae desunt. Inflorescentia e verticillo unico 3-usque 1 2-floro umbelloide , vel e 

 verticillis 2 vel 3 superpositis formata, rarius panniculata; bracteae connatae, breves, 

 hyalinae, marcescentes; pedunculi graciles, 3 usque 5 cm longi, patentes, saepe curvati ; 

 flores rnediocres, diam. 8 usque 15 mm; sep. laevia, late ovata, obtusa, serius recur- 

 \.ita; petala fere orbicularia, tenerrima, fugacia, sepalis duplo usque triplo longiora, alba 

 vel [»allide rosea; stamina 6, per paria ante petala inserta; filamenta linearia, antheris 

 lineari-oblongis, lateraliter dehiscentibus paullo longiora; carpella plura, apice in stylum 

 brevem terminantia. Fructus diam. ca. 4 usque 5 mm; fructiculi 2 usque 2,5 mm longi, 

 oblique elliptici, quinque-costati, apice indistincte apiculati viridiusculi, serius straminei ; 

 glandulae desunt. — V. pag. 25, Fig. II C, D. 



In Sümpfen und flachen Gewässern, sowie auf feuchtem Sande des westlichen und 

 Mullirlien Europa, der canarischen Inseln und der westlichen Ränder von Nord afrika. 



Formae diversae: E. ranunculoides haud saepe cum foliis submersis phyllodinis, 

 linearibus, teneris occurrit; haec forma a cel. El. Fries nomine: var. zosterifolius sa- 

 lutata est (in Koch Syn. ed. 2. II. (1844) 772), a cel. Marsson in Fl. Neuvorpommern, 

 (1869) 446 lapsu calami: sparganiifolius. 



Alisma repens Lam. Dict. encycl. meth. bot. II. (1790) 515; Cav. Icon. I. (1791) 

 41, t. 55; Alismd ranunculoides L. ß. repens Gray, Nat. arrang. brit. pl. II. (1821) 

 217; Engl. Bot., Supplem. (1834) t. 2722; Reichb. Deutschlands Flora V. (1845) 

 t. 55, fig. 97 ß y Echinodorus ranunculoidcsEngelm. repens Aschers. Fl. Prov. Brandenb. 

 I. (1864) 651 est forma (non varietas!) haud rara caulibus lateralibus arcuato-prostratis, 

 e nodis radicantibus. 



Not;i. Alisma alpestre Cosson in Bull. Soc. bot. France XI. (1864) 332. {Echinodocus 

 alpestrui Micheli in DC. Mon. Phaner. III. (1881) 47). Planta stolonifera, in omnibus partibus parva; 

 tolia obtusa; flores minuti; carpella pauciora, quadricostata. In regione alpestri prov. Asturicae 

 (Hisp.) una cum Saxifraga stellari, Drosera rotundifolia, Angelica pyrenaea a cel. Bourgeau lecta 

 nie judicante forma alpina depauperata Echin. ranunculoidis est. 



C. Planta major, perennis, facie speciminis minoris Älismatis plantaginis, enne- 

 andra, cubana. Stylus perbrevis. Fructiculi dorso plus minusve tuberculati. 



3. E. nymphaeifolius (Griseb.) Buchenau in Engler's Bot. Jahrb. II. (1882) 483. — 

 Alisma nymphaeifolium Griseb. Catal. pl. cubens. (1866) 216; Micheli in DC. Monogr. 

 Phaner. II. (1881) 36. — Perennis; rhizoma breve. Caules erecti, sulcati, cum inflores- 

 centia usque ca. 50 cm alti, foliis longiores. Folia externa submersa, phyllodina, late 

 linearia, obtusa, tenerrima, sequentia emersa, longe petiolata; petiolus 25 usque ca. 

 40 cm longus; lamina 10 usque 12 cm longa et 7 usque 8 cm lata, cordato-ovalis, apice 

 obtusa, basi sinu 2 usque 3 cm longo angusto cordata (lobis rotundatis) ; nervi primani 1 1 

 usque 13, secundani sub angulo acuto (ca. 75°) desinentes; lamina tenera, lineis pellu- 

 cidis brevibus obliquis ornata. Inflorescentia pyramidato-panniculata, verticillis ca. 5*, 

 bracteae lanceolato-acutatae, laeves, inferiores usque 30 mm longae; pedunculi graciles, 

 distantes, 10 usque 15 mm longi; flores parvi, diam. ca. 3 vel 4 mm; sepala ovata, 

 [•arallelinervia, laevia, serius recurvata; petala fere orbicularia, sepala vix aequantia; 

 stamina 6, filamenta filiformia, antheris ovatis (pluries?) longiora; carpella 8 usque 10, 

 angulo interno in stylum brevissimum desinentia. Fructiculi ca. 1,8 mm longi, rudi- 

 mento brevissimo styli coronati, sexcostati, costis tribus externis plus minusve distincte 

 tuberculatis; glandulae nullae. — V. pag. 2 5, Fig. 1 1 E, F, (r, H. 



Cuba (Ch. Wright n. 3196). 



D. Plantac anmute [E. tenellus in regionibus tropicis perdurans), graciles, americanae. 



4. E. tenellus Mart.) Buchenau in Abh. Nat. Ver. Bremen II. (1868) 21, 38. — 

 Alisma temUum Martius in Rom. et Schultes, L., Syst. veget. VII. 2. (1830) 1600. — 



