An illustrated guide to the flowering plants of the middle Atlantic and New England states (excepting the grasses and sedges) the descriptive text written in familiar language . road ear-like appendagesat base, lobed, margins prickly. Involucre egg-shaped or bell-shapod, itsbracts of several overlapping series. Receptacle, flat, naked. Fruit ob-long, oval or linear, ribbed, rough. The aigrette of soft white silkythreads without a beak or column. 1. S. arvensis, L. (Fig. 4, pi. 163.) Corn Sow-tmistle. Plant 2to 4 ft. high. Lower leaves often a ft. long, narrowed into short leaf-stalks. Flower s
An illustrated guide to the flowering plants of the middle Atlantic and New England states (excepting the grasses and sedges) the descriptive text written in familiar language . road ear-like appendagesat base, lobed, margins prickly. Involucre egg-shaped or bell-shapod, itsbracts of several overlapping series. Receptacle, flat, naked. Fruit ob-long, oval or linear, ribbed, rough. The aigrette of soft white silkythreads without a beak or column. 1. S. arvensis, L. (Fig. 4, pi. 163.) Corn Sow-tmistle. Plant 2to 4 ft. high. Lower leaves often a ft. long, narrowed into short leaf-stalks. Flower stems and involucre hairy. Low grounds, roadsides, 2. S. oleraceus, L. (Figs. 1 and 2, pi. 163.) Annual 1 to 10 ft. high. Basal leaves on long loaf-stalks, expanding into adeeply-lobed blade terminated by a broad triangular segment. The ear-like appendages with sharp angles. Involucre not hairy. Fields and wasteplaces. May-Nov. 3. S. asper, (L.) All. (Fig. 3, pi. 163.) Sharp-fringed Sow-thistle. Leaves spiny toothed; ear-like appendages at base of leavesrounded. Involucre not hairy. Waste places, most of our area. May-Nov. CHICORY FAMILY 617. Plate 1631. Sonchus oleraceus. 2. Another form of the same. 3. S. asper. 4. 618 CICHORIACEAE II. LACTUCA, L. Leafy herbs, with diffuse clusters of yellow, blue or white flowers, andalternate narrow leaves, which are lobed or not, the margins spiny, wavyor toothed. Heads several or many flowered, the involucre cylindric, ofoverlapping scales in 2 or more series. Receptacle flat, naked. Fruitflattened, oval to linear, with 1 to 5 ribs on each face, contracted into acolumn from tlie somewhat expanded summit of which spring the nearlysimple soft hairs of the white or brown pappus. Flowers Yellow Margins of leaves spiny. Lobed L. Scariola Not lobed L. virosa Margins not spiny. Whole plant hairy. Rays reddish yellow L. hirsuta Rays blue L. Morssii Plant not hairy or only the stem below hairy. Lower leave
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1910
