140 
Y. B. Wittrock. 
Hab.j in Groenlandia boreali, ubi legit D:r P. Öberg. 
Prof. S. Lovén hanc plantam mihi benevole communi¬ 
cavit. 
16. Oe. oboviforme nov. spec. 
Oe. dioicum, macrandrium, oogoniis singulis, obovifor- 
mibus, poro foecundationis in parte superiore oogonii sito; 
oosporis oogonia fere explentibus; cellulis suffultoriis eadem 
forma ac cellulis vegetativis ceteris; plantis masculis eadem 
crassitudine ac plantis femineis; spermogoniis 6—19cel- 
lularibus, spermatozoidiis binis, divisione verticali ortis; 
crassit. cell, veget. 21—32 g, altit. 3 V 2 —7plo majore; 
„ oogon. 58—65 „ „ 94—107 /i; 
„ oospor. 55—61 ,, „ 77—81 „ 
„ cell, spermog. 21—28 „ „ 5—13 „. 
Hab. in Mexico ad Vera Cruz, ubi cel. F. Müller 
legit 18|53; see. specimina in museo botanico universitatis 
Argentoratensis asservata. 
This species is nearly related to 0 e. tumidulum Kütz. 
(non auet. cet.) and Oe. Landsboroughi (Hass.) Wittr. ß 
gemelliparum (Pringsh.) Wittr. It differs from both through 
comparatively longer and obovate oospores, through some¬ 
what larger dimensions and through having the male spe¬ 
cimens developed as powerfully as the female. 
D. Species quarum organa fructificationis non satis 
nota nobis sunt. 
17. Oe. tapeinosporum Wittr. Prodr. Monog. Oedog. 
pag. 36. 
Hab. in Brasilia ad Lagoa Santa provinciæ Minas 
Geraës, ubi D:r E. Warming legit. Cand. O. Nordstedt 
hanc plantam, microscopice præparatam, mihi benevole 
communicavit. 
18. Oe. Warmingianum nov. spec. 
Oe. oogoniis singulis, oviformibus, poro foecundationis 
in superiore parte oogonii sito; oosporis subglobosis oogo¬ 
nia longe non complentibus; cellulis suffultoriis eadem 
forma ac cellulis vegetativis ceteris; 
