Zannichellia. 153 



Species exclusa. 

 Diplanthera spec. Griffith Icon. pl. asiat. III. t. 161, C. fig. 2 = Halophila ovalis. 



Tribus V. Zannichellieae. 



ZannichelUeae Kunth, Enum. pl. III. (1841) 123; Aschers, in Engl, et Prantl, Nat. 

 Pflzfam. II. I. (1889) 213; Aschers, et Graebner, Synops. mitteleurop. Fl. I. (1897) 360. 

 Character conf. p. 27. 



Conspectus generum. 



A. Flos masculus perigonio nullo, femineus perigonio membra- 

 naceo brevi cupuliformi et carpellis 2 — 8 (plerumque 4) sub- 



curvatis 8. Zannichellia L. 



B. FJos masculus perigonio breviter cupuliformi, tridentato, 



femineus perigonii foliis 3 liberis et carpellis 3 rectis . .9. Althenia Petit. 



8. Zannichellia l.*). 



Zannichellia [Micheli, Nov. pl. gen. (1729) 34] L. Gen. pl. ed. 1. (1737) 278; 

 ed. 5. (1754) 416; Spec. pl. ed. 1. (1753) 969; Roze, G., Le mode de fecondation 

 du Zannichellia palustris L., in Journ. de bot. I. (1887) 296 — 299; Aschers, in Engl, 

 et Prantl, Pflzfam. II. 1. (18 89) 213; Aschers, et Graebner, Synops. mitteleurop. 

 Fl. I. (1897) 360. — Zannichella L. Syst. ed. 1. (1735). — Zanichelia Gilib. 

 Exercit. II. (1792) 419. — Zanichellia Roth, Tent. fl. Germ. II. 2. (1793) 420. — 

 Zannichallia Reut, in Compt. rend. Soc. Haller. (1854 — 56) 129. — Pelta Dulac, Fl. 

 Hautes-Pyren. (1867) 43. 



Flores monoici, masculi et feminei plerumque arcte approximati. Flos masculus 

 distincte, nunc longe pedunculatus, perigonio nullo, anthera (interdum binis) thecis binis 

 connectivo excurrente longitudinaliter adnatis. Flos femineus perigonio membranaceo 

 breviter cupuliformi basin carpellorum cingente. Carpella 1 — 8 (plerumque 4) sessilia 

 vel stipitata oblonga compressa. Stylus brevis vel elongatus. Stigma peltatum. 

 Ovulum unicum pendulum. Carpella matura coriacea compressa, germinatione in 2 

 valvas dehiscentia vel plerumque fissura unilaterali. Semen oblongum, testa tenui, albu- 

 mine nullo. Embryonis cotyledon longe acuminata et circinnatim inflexa. — Rhizoma 

 repens, tenue, internodiis ad 4 cm longis. Caulis tenuis, basi prophyllo vaginato, repens 

 in nodis radicans vel parte superiore fluitans. Folia anguste linearia, stipula magna 

 amplexicauli, rarius vaginata et 2 squamulis intravaginalibus. 



Conspectus sectionum. 



A. Folia basi stipula libera instructa. Fructus plerumque 2 vel 



plures, valde obliqui Sect. 1 . Euzannichellia. 



B. Folia basi vaginantia. Fructus solitarii vel gemini plus 



minus in vaginas foliorum inclusi Sect. 2. Pseudo- Althenia. 



Sect. 1. Euzannichellia Graebner. 



Character vide supra. 

 Species unica. 



1. Z. palustris L. Spec. pl. ed. 1. (1753) 969; Aschers. Fl. Prov. Brandenb. I. 

 (1864) 668; Boiss. Fl. orient. V. (1884) 14; Aschers, et Graebner, Synops. mitteleurop. 



*) Gian Girolamo Zannichelli (1662 — 1727), pharmacopola Venetianus, de flora veneta 

 et istriaca optime meritus; conf. Ascherson et Graebner, Synops. I. p. 360. 



