Sagittauii. 



57 



G. Mexicana. Pedunculi fertiles incrassati, ereeti. Spec. 26. 



2(>. S. macrophylla Zucc. in Abb. Kön. Bayr. Acad I. (I83S) 289 (non Bunge). — 

 8. mexicana Steud. Nom. bot. II. (<84I) 491; Schlechtd. in Linnaea XVIII. (l 844) 432; 

 Buchenau in Abb. Nat Ver. Brem. II. (1868) 25, 42; Micheli in DC. Monogr. Phaner. 

 III. (4881) 71; Smith in Rep. Miss. Bot. Garden VI. (I 894) 30, 33, t. 27. — Peremi i-. 

 stolonifera, valida. Caules 3 usque \ dm alti , teretes, ereeti , folia aequantes. Folia 

 longe petiolata; lamina magna, lanceolata, utrinque angustata vel basi obtusa, mutica 

 vel basi uni-vel bilobata (hastata) sub-pseudopenninervia (lobi plerumque parvi, acutati). 

 Inflorescentia verticillato-racemosa, brevis, verticillis 3 usque 5, raro 6; bracteae obtusae, 

 x us([ue 20 mm longae, lere usque ad apicem connatae; pedunculi erecto- patentes, 

 stricti, fertiles 6 usque 7 (raro 10) cm longi, incrassati, steriles breviores, tenuiores; 

 flores magni, diam. ca. 3 cm; petala alba; stamina 20 usque 30; filamenta glabra, 

 tinearia vel elliptico-linearia acutata, antheris longiora. Fructus magnitudine pisi major». 

 Fructiculi maturi ignoti. 



Mexiko. New-Orleans (leg. Pendler). 



Nota. Species insignis, lancifoliae affinis, sed differt foliis saepe uni- vel bilofj.it is. Iiastatis. 

 inflorescentia breviore, pedunculis erecto-patentibus, strictis, fertilibus crassioribus. 



EL Pedunculi fertiles incrassati, serius recurvati. 



a. Erecta. Spec. 27. 



27. S. platyphylla (Engelm.) Smith in Rep. Miss. Bot. Garden VI. (1894) 4, 29, 

 t. 2 6. — 8, graminea Michx. var. platyphylla Engelm. in A. Gray, Manual, ed. 5 (186") 

 494. — Micheli in DC. Monogr. Phaner. III. (I 881) 70. — S. recurva Engelm. in Patterson, 

 Checklist (1887) 130 (nomen tantum); Britton et Brown, Illustr. Fl. North. Un. States I. 

 (1896) 92. — Perennis, stolonifera et tuberifera. Caules ereeti, teretes, 2 usque 5 dm 

 alti, folia subaequantes. Folia longe petiolata; lamina subcoriacea, anguste lanceolata 

 usque late ovata, sub-pseudopenninervia, apice acuta, basi angustata vel obtusa, raro 

 subcordata vel auriculata. Inflorescentia verticillato-racemosa, verticillis 4 usque 6, infi- 

 mis 2 usque 4 femineis ; bracteae late-ovatae, 3 usque 8 mm longae, vix connatae; 

 pedunculi 1 2 usque 2 5 mm longi , fertiles post anthesin recurvati et incrassati ; flores 

 medioeres; stamina ca. 20; iilamenta lanceolata, pubescentia, antheris oblongis sub- 

 longiora. Fructus diam. ca. I mm ; fructiculi 2 mm longi, oblique-obovati, lateraliter 

 rostrati, dorso alati, lateribus subcarinatis. 



In Sümpfen und kleinen Gewässern von Texas und Mississippi nordwärts bis 

 zum südlichen Missouri. 



Nota. 8. platyphylla affinis est S. gramineae, macrophyllae et lancifoliae, sed diflfert 

 pedunculis fertilibus brevioribus, incrassatis et recurvatis; a S. graminea differt etiam foliis 

 pseudopenninerviis (in S. graminea nervi omnes a basi discreti). 



b. Pluitantes. Spec. 28 — 31. 



28. S. Sanfordii Greene in Pittonia II. (1890) 158; Smith in Rep. Miss. Bot. 

 Garden VI. (189 4) 31, t. 28. — Planta perennis, stolonifera, tota submersa, 9 usque 

 15 dm longa, spongiosa. Folia phyliodina, late linearia, basi crassa, subtriqmtra : 

 lamina (si adest) 4 usque 7 cm longa, anguste-lanceolata, acuta, parallelinervia. Caules 

 crassi, foliis breviores. Inflorescentia racemosa, verticillis 3 usque pluribus, approxiniatis, 

 inliniis 2 vel 3 fertilibus; bracteae trianguläres, obtusae, basi connatae; pedunculi fer- 

 tiles incrassati, recurvati; flores medioeres; sepala ovata; stamina ca. 20; filamenta e 

 basi ovata linearia, antheras oblongas fere aequantia. Fructus 12 usque 14 mm diam,; 

 fructiculi tiiangulari-cuneati (raro latiores), oblique rostrati. 



California: San Joaquin-River (Greene). 



Nota. Fructiculos nonnullos tantum vidi. Greene ei Smith eos »quadrate-euneate« 

 ajipellant, sed semper triangulari-cuneatos inveni, 



Nota. Planta memorabilis. cujus l<jlia nunquara sagittiformia sunt; aiiinitas ejus adhuc 

 obscura est. 



