304 THE FLORA. 



ORDER CXXXII. TYPHACE^E. Typhads. 



Herbs growing in marshes and ditches, with rigid, sword-shaped leaves; 

 flowers mono3cious, arranged on a spadix or in heads with no spathe ; 

 perianth of a few scales, or a tuft of hairs, or 0; stamens 1-4, slender; 

 oviry 1-ovuled, nut-like and 1-seeded in fruit. Comprises 2 genera. 



Analysis of the Genera,, 



{ Cat-tail. Reed-mace. Spadix long-cj-lindric, brownish green, the sterile flowers above, 

 the fertile innumerable, packed solid in the lower part. Stem with its terminal spa- 

 dix 3-4f., the leaves 4-5f. long. TTPHA. 



% Burr-reed. Spadices or globular heads many, the lower fertile ; pistil? sessile, each 

 with 3-6 scales for a calyx. Upper heads stamiuate. SPAROA'NIUM 



ORDER CXXXIIL NAIADACE^E. Naiads. 



Water plants, with sheathing petioles or stipules, and jointed stems; 

 flowers often perfect, with a perianth, or imperfect and naked ; with 

 stamens definite, ovaries free, sessile, and 1-seeded indehiscent/rutf. 



The Naiads grow in rivers, lakes, or seas. They have linear, grass-like leaves, and 

 some of the Pondwefds have broad or oval leaves beside. 



Fotamoge'ton (t'ondweed) is the principal genus. Its flowers are perfect, irreenish, 

 clustered on spike-like spadices which arise just above the water while ii> bioom. The 

 stamens, sepals, and ovaries are each 4, and the fruit 4 achenia. We have about 20 species, 

 all in fresh water. Eight of these have two kinds of leaves ; the submersed linear, the 

 floating elliptical. The other species have all their ivs. submersed and linear. (St 

 Botanist and florist.) 



COHORT VI. 



FLORIDEZE, OR THE FLOWERING ENDOQENS. 



ORDER CXXXIV. HYDROCHARIDACE^E. Progbits, 



Aquatic herbs with regular, imperfect flowers growing from a apatue ; 

 perianth 3 or 6-parted, the inner segments petaloid; stamens 3-12; 

 ovary adherent, 6-9-celled ; fruit iudehiscent, many-seeded. 



