. Introduction to botany. Botany. Introduction to Botany. Tripsacum dactyloides, L. (Gr., daktylos, finger; eidos, resemblance.) Gama Grass. Stems 4 to 8 feet tall; spikes single or several, branching from a common base. One of our largest grasses. Moist soil. CYPERACE^. Sedge Family. Grasslike or rushlike herbs with fibrous roots ; sometimes perennial by elongated rootstocks. Stems 3-4-angled, rounded or flattened, usually solid. Leaves alternate and 3-ranked, sheathing at the base, and not split open down one side as in grasses. Flowers perfect or imperfect in i-many-flowered spikelets; i fl
. Introduction to botany. Botany. Introduction to Botany. Tripsacum dactyloides, L. (Gr., daktylos, finger; eidos, resemblance.) Gama Grass. Stems 4 to 8 feet tall; spikes single or several, branching from a common base. One of our largest grasses. Moist soil. CYPERACE^. Sedge Family. Grasslike or rushlike herbs with fibrous roots ; sometimes perennial by elongated rootstocks. Stems 3-4-angled, rounded or flattened, usually solid. Leaves alternate and 3-ranked, sheathing at the base, and not split open down one side as in grasses. Flowers perfect or imperfect in i-many-flowered spikelets; i flower in the axil of each of the glumes or bracts. Style 2-3-cleft; fruit an acheme, flattened, lenticular, or 3-angled. Stamens usually 3. The chief genera are Cypferus, Ele6charis, Sci'rpus, and Ckrex. (See Figs. 342-345.) ARACE.^. Arum Family. Herbs with long-petioled, simple, or compound leaves, rising from a corm or tuberous rootstock ; sap usually very pungent. Flowers monoe- cious or dicecious and densely crowded on a spadix which is usually surrounded by a spathe (see Fig. 346). Stamens 4-10 with short fila- ments ; ovary i-several-celled, with i-several ovules in each cell. Fruit usually a berry. Sepals and petals usually absent. ARISAEMA. Indian Turnip. Dragon Arum. (Gr., ariSi a kind of arum, and kaima, blood.) Leaves deeply divided, rising on long petioles from a corm, and sheathing the base of the simple scape. Flowers covering the lower part of an elon- gated spadix; spathe convolute below and over- hanging above. (Fig. 346.) Flowers moncecious or dioecious, destitute of calyx or corolla. Ovary containing 5 or 6 orthotropous ovules rising from a basal placenta. Fruit a globose red Fig. 346. Infliirescenceof Aris- Eema. ^, the spathe, cut open below and showing the flow- ers clustered at the base of the spadix, 1. ArisEema triph^Uum,Torr. (L.,/////;i'//»»!, 3-leaved, from Greek fri, three; phyllon, leaf.) iNDIAK TURNIP. Jack-in-the-pulpit. Leaves 3-foliate
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