. Essentials of botany. Botany; Botany. 22 KEY AND FLORA Scapes erect, becoming longer than the leaves, cylindrical, spongy. Flowers bisexual, in paniculate, 3-bracted umbels, small, -white or pink. Stamens 6-9. Ovaries numerous in one or more whorls on a flat recepta- cle. Fruit 1-seeded akenes which are ribbed on the back and sides.* 1. A. Plantago-aquatica L. Water Plantain. Peren- nial ; root fibrous. Leaves ovate or somewhat cordate, 5-7-nerved when erect, float- ing leaves narrower and sometimes linear. Scapes usually single; panicle 1-2 ft. long ; flowering branches whorled, subtended b
. Essentials of botany. Botany; Botany. 22 KEY AND FLORA Scapes erect, becoming longer than the leaves, cylindrical, spongy. Flowers bisexual, in paniculate, 3-bracted umbels, small, -white or pink. Stamens 6-9. Ovaries numerous in one or more whorls on a flat recepta- cle. Fruit 1-seeded akenes which are ribbed on the back and sides.* 1. A. Plantago-aquatica L. Water Plantain. Peren- nial ; root fibrous. Leaves ovate or somewhat cordate, 5-7-nerved when erect, float- ing leaves narrower and sometimes linear. Scapes usually single; panicle 1-2 ft. long ; flowering branches whorled, subtended by three narrow, striate bracts; pedi- cels slender, elongated. Ova- ries 15-20 in a single whorl; base of the short style per- sistent, forming a beak at the inner angle of the akene. Akenes obliquely obovate, 2-3-keeled on the back. Common in ponds and muddy places.*. Fig. 2. Diagrammatic representation of a several-flowered grass spikelet g, g", the glumes; p, p', the palets; I, lod- icules; /, a flower. The axis is much lengthened, to sep- arate the flowers. (After Schimper) Fig. 3. Spike-like panicle of ver- nal grass (An- thoxanthum) GRAMINEiE. Grass Family a, mature anthers. (Slightly enlarged) Mostly herbs, with usu- ally hollow stems, closed and enlarged at the nodes. Leaves alternate, in two ranks, with sheathing bases, which are split open on the side opposite the blade. Mowers nearly or quite destitute of floral envelopes, solitary, and borne in the axils of scaly bracts, which are arranged in two ranks. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1908
