Gray's Lessons in Botany and Vegetable Physiology |
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1-celled Achenia albumen anthers apex awl-shaped axillary axils bark base blossom bracts branches bristles calyx Calyx-tube carpels cells clustered common compound corolla corymbed cotyledons cymes deciduous downy drupe elongated embryo erect filaments flat fleshy Flowers white fruit genus glabrous globular hairy heads heart-shaped herbs Illinois imbricated inner involucels involucre June Kentucky lanceolate leaf leaflets leafy leaves linear lobes many-flowered many-seeded margins Michx minute naked narrow nearly northward numerous Nutt oblong obovate obtuse oval ovary ovate ovate-lanceolate ovules panicled Pappus pedicels peduncles perennial petals petioles pinnate pistils placenta plants pods pubescent purple racemes radicle rarely rays receptacle root rootstock round roundish scales seeds sepals serrate sessile short shrubs simple slender smooth soil sometimes species spikes spreading stalk stamens stem stigma stipules styles summit tapering thick thickish toothed Tourn tree umbel upper valves Virginia and southward whorled winged Wisconsin wood yellow
Popular passages
Page 54 - Thus, the Washington Elm at Cambridge — a tree of no extraordinary size — was some years ago estimated to produce a crop of seven millions of leaves, exposing a surface of 200,000 square feet, or about five acres, of foliage.
Page 98 - ... gradations, that it is impossible to say where the one ends and the other begins.
Page 485 - Stigma a broad glutinous surface (except in Cypripedium). — Perennials, often tuberous, sometimes parasitic, with leaves mostly alternate. Flowers showy and singular in shape, arranged for cross-fertilization by means of insects.