droseba. CERATOPHYLLACEJE. 215 



CEBATOPHYLLUM. 



and alternate with them, rarely 2 or 3 times as many, marces- 

 cent; anthers extrorse or innate, the cells distinct or somewhat 

 connivent above, opening down the sides or rarely by a termi- 

 nal pore. Ovary composed of 2-5 united carpels: placenta 

 parietal or filling the base of the cell. Styles 2-5, distinct or 

 united at base, each 2-parted. or multifid and pencil-shaped, 

 sometimes all united into one. Capsule loculicidally 2-5-valved 

 or indehiscent mostly many-seeded. Seeds anatropous; the 

 testa sometimes arilliform. Embryo short, at the base of car- 

 tilaginous or fleshy albumen. 



1 DROSERA L. Gen. n. 391 (^u.ndew). 



Small herbs growing in sphagnous or sandy marshes, with the 

 leaves all radical and furnished with numerous long glandular 

 hairs, and small flowers on simple scapes. Stamens 5, styles 

 3-5, 2-parted with the divisions somewhat thickened toward the 

 apex, or multifid. Capsule subglobose or ovoid, usually 3-valved 

 at the top: the valves placentiferous to the top. Seeds numer- 

 ous, in 2-5 rows on each placenta. 



D. rotuiidifolia L. Sp. i. 281. Leaves spreading, orbicular, ab- 

 ruptly attenuate to a long hairy petiole: scapes 2-6 inches high, 5-10-flow- 

 ered : petals oblong, 2 lines lon^, .i little exceeding the oblong sepals : styles 

 short, 2-parted : capsule included in the calyx : seeds linear with a loose 

 coat, in cold marshes Alaska to California, the Atlantic States and 

 Europe. 



D. Aiiglica Hudson Fl. Angl. 135. Leaves ascending, oblong, attenuate 

 into the slender naked petioles: scapes 3-10 inches high, sometimes forked 

 at the top, few-flowered : petals linear-oblanceolate 3-4 lines long nearlj* 

 twice longer than the oblong sepals : capsule exceeding the calyx : seeds 

 linear with a loose coat. In cold marshes Alaska to California, Siberia and 

 northern Europe. 



Order XXXV. CERATOPHYLLACE.E. Grav, Ann. Lvc. 



X. Y. iv, 41, 



Perennial submerged aquatic herbs with cylindrical jointed 

 stems and branches, vertieillate, sessile, filliformly 2-3-choto- 

 mous leaves without stipules, and sessile axillary-flowers. 

 Flowers monoecious without perianth but surrounded by a 

 persistent 8- 12-cleft involucre; anthers numerous sessile, fleshy, 

 2-3-cuspidate at top, ovary solitary, 1-celled, with a pendulous 

 orthotropou? ovule; achene beaked by the slender persistent 

 style, seeds with membranous transparent testa and no albumen; 

 radicle inferior very short; the cotyledons thick and oval, the 

 highly developed plumule consisting of several nodes and 

 leaves. 



1 CERATOPHYLLUM L. Gasrtn Fr. t. 44. 



Characters as of the order. 



C. demersum L. Sp. 1409. Stems very slender, a foot or two long, 



