28 Er. Buchenau. — Alismataceae. 



Älisma ranuneuloides L. var. brasiliensis A. de St. Hilaire, Voy.Distr. Diam. II. (1 833) 432 ; 

 Kunth, Enum. pl. III. (1841) 149; Endl. et Mart. Fl. brasil. fasc. VIII. (1847) 105 t. 13, 

 f. 1. — Echinodorus subulatus A. Gray (non Engelmann!), Man. ed. 1. (1848) 460. — 

 Echinodorus parvulus Engelm. in Asa Gray, Man. ed. 2. (1856) 438; Micheli in DG. 

 Monogr. Phaner. III. (1881) 47; E. L. Rand in Rhodora V. (1903) 83; R. L. Robinson, 

 ibid., 85, t. 45, f. 1 — 10. — Planta parva (raro ultra 10 cm alta!) variabilis, annua 

 (in regionibus tropicis perennis), stolonifera. Gaules debiles, tenues, erecti vel adscendentes, 

 cum inflorescentia 2 usque 12, raro 20 cm alti. Folia valde variabilia, longe pedunculata, 

 lamina ca. f cm longa, ovata usque linearis, plerumque lanceolata et utrinque acuta, 

 uni- vel raro trinervis, lineis pellucidis destituta. Inflorescentia plerumque umbelloides, 

 verticillo unico, 3- usque purifloro, rarius verticillis 2 vel 3 remotis; bracteae lanceo- 

 latae (in planta Gollmeriana obtusae); pedunculi graciles, 5 usqüe ca. 25 mm longi, 

 post anthesin saepe recurvati; flores minores, diam. 7 usque fere 10 mm; sepala fere 

 orbicularia, concava, persistentia, erecta; petala sepalis ca. duplo longiora, orbicularia, 

 tenerrima; stamina 9, biserialia, 6 sepalis, 3 petalis anteposita; carpella ca. 12 usque 15, 

 stylo brevissimo uncinato coronata. Fructus a sepalis obtectus; fructiculi parvi, ca. 1 mm 

 longi, dimidio reniformes, castanei vel fere nigri, octocostati, angulo interno rudimento 

 brevissimo styli coronati vel omnino mutici; pericarpium firmum, castaneum vel fere 

 nigrum; glandulae laterales nullae. — V. pag. 25, Fig. 1 1 /, K, L. 



In Amerika von Massachussets und Michigan bis Florida und dann wieder von 

 Venezuela und Neu-Granada bis Paraguay und der Randa oriental verbreitet; aus West- 

 indien noch nicht bekannt. Auf feuchtem Sande und Schlamm wachsend, selten im 

 Wasser flutend (Gollmer, Venezuela); solche Exemplare sind meist sehr verlängert. 



5. E. patagonicus Spegazzini in Anal. Mus. Nac. Ruenos Ayres, VII. (1902) 174. 

 — Annuus. Caules erecti, 20 usque 30 cm longi, foliis longiores, acute trigoni. Folia 

 pedunculata (pedunculo 10 usque 18, lamina 30 usque 50 cm longa); lamina ovata, 

 basi subtruncata vel leviter cordata, apice obtusa vel acutiuscula, membranacea, lineis 

 pellucidis crebris ornata. Inflorescentia e verticillis 2 vel 3 remotis, 3- usque 6-floris 

 composita; bracteae lineares, 5 usque 8 mm longae; pedunculi 6 usque 12 mm longi; 

 flores parvi; sepala ovata, obtusa, 3 usque 4 mm longa; petala breviora, alba; stamina 

 parva, 8 usque 12; carpella numerosa. Fructiculi dimidio -obovati, stylo subtereti 

 aequilongo coronati, e latere compressi et nervosi, inter nervös glandula solitaria ornati. 



In Sümpfen bei Fuerte Roca, Neuquen, Patagonien. 



Nota. Species pulchella, mihi ignota. Spegazzini eam E. elliptieo affinem esse dicit; 

 mea opinione probab. E. intermcdio proxima, sed annua! 



E. Perennis, boreali-americana. Caules prostrati, saepe e nodis radicantes. Folia 

 truncata vel cordata, lineis pellucidis ornata. 



6. E. radicans (Nutt.) Engelm. in As. Gray, Manual of bot., ed. 2. (1856) 438. — 

 Sagittaria radicans Nutt. in Trans. Amer. Phil. Soc. V. (1837) 159; Micheli in DC. Monogr. 

 Phaner. III. (1881) 55; Rritton et Rrown, 111. Fl. North. Un. St. I. (1896) 86. — Perennis. 

 Caules elongati (usque metrales et ultra), arcuato-prostrati et saepe e nodis radicantes, 

 subteretes, striati (sub verticillis triangulosi). Folia emersa erecta, longe petiolata; petioli 

 angulosi, 10 usque 75 cm longi, intus septati; lamina saepe magna, usque 18 cm longa 

 et 1 5 cm lata, late ovata, apice obtusa, basi truncata vel saepius cordata, 7- usque 9- 

 nervia (nervi secundani a primanis angulo fere recto — • ca. 80° — desinentes), lineis 

 pellucidis crebris vel sparsis, conspicuis vel indistinctis ornata. Inflorescentia e verti- 

 cillis pluribus remotis composita, rarius basi brachiata; verticilli multiflori; bracteae vix 

 coalitae, lanceolatae, longe acuminatae, laeves, ca. 1 5 mm longae , interdum infimae in 

 quoque verticillo frondescentes ; pedunculi graciles, 25 usque ca. 50 mm longi, valleculati, 

 post anthesin saepe recurvati; flores conspicui, diam. 15 usque 18 mm; sepala late ovata, 

 obtusa, dorso scabriusculo-costata, serius recurvata, persistentia; petala obovata, sepalis 

 ca. duplo longiora ; stamina saepe 2 1 ; filamenta linearia, antheris elongatis, dorso supra 

 basin affixis plus quam duplo longiora; carpella numerosa, apice stylo crassiusculo 



