422 MONOCOTYLEDONES — PETAI.OIDE/E. 



sped — Aquatics. \jQTi\e% radical on long stalks. J. Alisma,/*. 

 137. 2. AcTiNOCARPus, p. 137. 3. Sagittaria, /?. 324. 



Ord. LXXXII. BUTOxME.E. Perianth of 6 pieces, the 3 

 inner petaloid. Stamens definite or indefinite, liypogynoiis. 

 Ovaries 3 or G, or more, distinct or united. Stigmas as many, 

 simple. Fallicles several, either distinct and rostrate or united 

 into one. Seeds minute, numerous, attaclied to a reticulated re- 

 ceptacle, lining the inner surface of the cell. Albumen 



Aquatics. Leaves very cellular. Flowers umbellate, handsome. — 

 BuTOMUs, p. 167. 



Ord. LXXXIIl. JUNCAGINE^. Perianth uniform, 

 rarely none, not petaloid. Stamens hypogynous. Ovaries su- 

 perior. Ovules solitary or two, approximated at the base ; 

 erect. Pei-icarps \i\Ae\\'\&cent. Pmbnjo without albumen, having 

 the same direction as the seed, with a lateral cleft for the 



emission of the phimide Marsh Herbs with narrow radical 



leaves. Flowers sjnked or racemed. — 1. Triglochin, /;. 136. 2. 

 Scheuchzeria, ^A 136. 



Ord. LXXXIV. AROIDE^. (Br.) Flowers s^inthiiceous, 

 on a spadix ; sometimes with the anthers and pistils separated, 

 and then generally naked; sometimes perfect, with a 4 — 6, 

 rarely 3-partite perianth, the latter not petaloid. Stamens very 

 numerous in those with naked flowers : in the genera with a 

 perianth usually opposite, and equal in number to the segments 

 of the latter. Anthers turned outwards. Ovaries free, solitary 

 or numerous, 1 — 3-celled, 1— many-seeded. Ovules erect, some- 

 times pendulous or parietal. Stgle (usually) none. Stigma 1. 

 Pericarp indehiscent, baccate or capsular. Emhri/o in the axis 

 of a fleshy albumen, with the same direction as the seed, rarely 

 with a contrary direction, having a cleft on its side for the 

 emission of the jjlwmde. — Tribe 1. ArinejE. Perianth 0. Fruit 

 a berry. Spadix spathaceous. Root frequently tujberous. Leaves 

 sheathing at the base, convolute in (estivation, simple or compound, 

 often cordate and with branching veins. Acrid and poisonous ; but 

 if the juice is dissipated by heat, or extracted by pressure, the 

 leaves and roots become esculent ; and the fecula of the latter 

 capable of being converted into excellent bread. Thus the 

 Caladium esculentum, and its allied species, are abundantly eaten 

 in Avarm countries. 1. Arum, p. 324. — Tribe 2. Acorace.t;. 

 Flowers perject surrounded by a perianth. Spatha? leajlike. 

 Stamens 6. Fruit a berrrj. Herbaceous Marsh plants. Leaves 

 ensiform, equitant. 2. AcoRus, p. 136. — Tribe 3. Typhine^. 

 Flowers monoecious, surrounded by a perianth. Stam. 3, Fruit 

 an achenium. Herbaceous Marsh plants. Leaves ensiform with 

 parallel veins. Spadix tvithout a spatha. A. Typha, p.^2\. 5. 

 Sparganium, p. 322. A 



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