ARACE^. 381 



Lakes, &c. Can. and N. Y. Aug. Q]..—Stem long and slender. Leaves 

 very long, linear, pellucid. It may be only a variety of the preceding. 



Floating Bur-reed. 



2. TYPHA. Linn— Cdit-Tdiil 

 (From the Greek rKpos, a marsh ; on account of its place of growth.) 

 Flowers collected into a long dense cylindric spike. Ste- 

 rile Fl. above. Stamens numerous, intermixed with simple 

 hairs inserted directly on the axis. Flaments slender, 2 — 4 

 forked. Fertile Fl. beloW the 'sterile on the same axis. Ova- 

 ries numerous, surrounded at base with numerous clavate bris- 

 tles. Fruit oblong, very small, stipitate. 



1. T". latifoLia Linn. : leaves linear, nearly flat; sterile and fertile spikes 



close together or almost continuous. 



Borders of swamps and ponds. Can. to Car. July, Aug. %-. — Stems clus- 

 tered, 4 — 5 feet high, simple, round, leafy at base. Leaves very long. Flowers 

 in a cylindric spike, the sterile yellowish, the fertile brownish. 



Broad-leaved Cat'tail. Reed-mace. 



2. T. angustifolia Linn. : leaves linear, channelled near the base ; ste- 

 rile and fertile spikes a little distant from each other. 



Borders of swamps and ponds. N. Y. to Virg. July, Aug. %.. — Stems and 

 spikes more slender, and the leaves narrower, than in the preceding. 



Narrow-leaved Cat-tail. 



Order CXLIII. ARACE^.— Arums. 



Flowers mostly monoecious, arranged on a spadix within a 

 spathe. Sterile Fl. Stamens very short ; anthers turned out- 

 wards. Fertile Fl. at the base of the spadix. Ovary free, 

 1 — 3- or more-celled ; stigma sessile. Fruit succulent. Seeds 

 pulpy. — Herbaceous plants frequently with a fleshy cormus, or 

 shrubs. Leaves sheathing at the base, sometimes compound. 



1. ARISiEMA. Mart. T<n-r.— Dragon Arum. 

 ■ (Origin of the name unknown.) 



Spathe convolute below, the limb arched or flattish. Spa- 

 dix naked above, the lower part covered with flowers, of which 

 the upper are sterile and the lower fertile, or in some plants 

 all sterile. Anthers somewhat verticillate and distinct. Fila- 

 ments very short. Ovaries 1 -celled, numerous. Stigma capi- 

 tate-peltate, almost sessile. Berry 1- several-seeded. 



1. A. triphyllum Torr.: leaves ternate ; leafets elliptic-ovate, sessile, 

 acuminate, entire; spadix clavate, obtuse, shorter than the spathe. A, 

 atroriiben^ Blume. Arum triphyllum Linn. A. atrorubens Ait. 



