42 Fr. Buchenau. — Alismataceae. 



Nota 2. J. G. Smith (Report Missouri Bot. Gard. XI. (1 899) p. 4 45 — 1 54) sex species boreali- 

 americanas enumerat, describit et pro maxima parte iconibus illustrat: Lophotocarpus fluitans, 

 californicus, calycinus, depauperatus , spongiosus, spathulatus. Sed descriptiones haud semper 

 cum iconibus quadrant et me judicante tarnen L. spathulatus satis differre videtur; reliquae 5 

 species ad unam: Sagittaria calyeina Engelm. contrahenda sunt. 



Smith hanc clavem analyticam dat: 



1) Petioles and scapes about equal, very slender; leaves hastate; dorsal wing of the mature 

 achene inflated.*) 



a) Fertile pedicels 3 — 5 cm long, very slender, shorter than the 2 or 3 internodes, beak of the 

 achenia very short**) {Sag. calyeina var. fluitans Engelm.) L. fluitans Smith; p. 4 45, t.53. 



b) Fertile pedicels equaling the internodes ; verticils 5 or more. L. californicus Smith ; p. 4 46, t. 54. 



2) Petioles thick and spongy, longer than the weak, ascending or at length decumbent scape; 

 dorsal wing of the achene thin, flat, not inflated. 



a) Leaves with sagittate or hastate blades, seldom bladeless. Plants growing in fresh water 

 ponds and marshes. 



cc) Basal lobes of the leaves widely divergent; large plants, 2 — 6 dm. high. L. calycinus 



(Engelm.) Smith; p. 4 47. 

 ß) Basal lobes not widely divergent; low plants, 4 — 4,5 dm. high. [Sag. calyeina var. depau- 



perata Engelm. in herb.) L. depauperatus Smith ; p. 4 48, t. 55. 



b) Leaves mostly bladeless phyllodia. Submerged seashore and tidal flat aquatics. 



a) Phyllodia thick, spongy, nodose***), 4 — 3 dm long. {Sag. calyeina var. spongiosa Engelm.) 



L. spongiosus Smith; p. 4 48, t. 56. 

 ß) Phyllodia flat, spathulate, not nodose, 3 — 7 cm high. L. spathulatus Smith; p. 4 49, t. 57. 



3. S. intermedia Micheli in DC. Monogr. Phaner. III. (188 4) 80. — S. acuti- 

 folia Griseb. Cat. pl. cubens. (1866) 218 non L. — Perennis, (an stolonifera?). Habitus 

 S. calycinae. Caules erecti, subangulosi, 20 usque 40 cm alti, folia aequantes. Folia 

 emersa longe peduneulata, perfecta sagittiformia ; lamina 5 usque 15 cm longa, late 

 triangularis, lobis basilaribus terminali longioribus, acutatis, valde divergentibus. Inflo- 

 rescentia verticillato-racemosa, verticillis approximatis ; bracteae ovatae, obtusae, connatae; 

 peduneuli breves, 5 usque 15 mm longi, fertiles crassiores, steriles graciliores; flores 

 probabiliter polygami, inferiores hermaphroditi (vel feminei?), superiores pauei mascu- 

 lini; sepala late ovata, obtusa, post anthesin vix ereeta et fruetum non amplectentia; 

 petala ignota ; stamina in floribus masculinis 1 usque 1 2 ; filamenta glabra. Fructus 

 fere globosus, diam. 10 usque 12 mm; frueticuli 2 usque 2,5 mm longi, obovato-euneati, 

 utrinque alati, dorso undulati, lateraliter obscure costati et tuberculis minutis instrueta, 

 circa loculum glandulosi; rostrum in angulo superiore horizontale, ca. 0,3 mm longum. 

 (Fig. 13(7). 



Cuba (Wright, n. 3199 et 3201), Jamaica (Purdie et Dancer teste Micheli). 



Nota. Species imperfecte cognita, sed frueticulis lateraliter tuberculatis facile agnoscenda. 



Nota. S. Sprucei Micheli in DG. Monogr. Phaner. III. (1881) 80: »Foliis sagittatis; scapo 

 erecto, paueifloro; bracteis fere liberis; floribus hermaphroditis vel polygamis, sessilibus, erectis; 

 sepalis post anthesin erectis, carpellis lateraliter eglandulis, stylo arcuato longo aristatis«. 20 

 usque 30 cm [alta. Inflorescentia verticillato-racemosa ; flores medioeres vel parvi, brevissime 

 peduneulati, inferiores probab. hermaphroditi, superiores masculi. Stamina ca. 4 2. Carpella 

 4 mm longa, dorso cristato-alata, lateraliter obscure costata. »Specimina completa in nullo 

 herbario reperiuntur« (Mich.) Species imperfecte nota. Affinis Sag. calycinae vel intermedia^ 

 esse videtur. 



B. Meridionali-americanae. Sepala post anthesin amplificata, fruetu adpressa. 

 Species 4 — 7. 



4. S. pugioniformis L. Diss. de pl. surin. (1775) 15 et Amoen. acad. VIII. (1783) 

 263. — S. acutifoliah. f. Suppl. pl. (17 81) 419; Seubert in Fl. brasil. fasc. 8. (18 47) 



*j Expressio minus bona; ala non cava est. Opinio est: ala non compressa tenuissima , essej 

 **) Tabula 53 rostrum longum demonstra! ! 

 ***) Nodosa??? Probabiliter »transversim septata« ! Tab. 56 plantam demonstrat, omnibus 

 fere foliis perfectis, hastatis. 



