. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 16. Cirsium palustre (L.) Scop. Fig. 4651. Marsh Thistle. Carduus palustris L. Sp. PI. 822. 1753. Cirsium palustre Scop. Fl. Cam. Ed. 2, 2: 128. 1772. Annual or biennial; stem little branched, 4°-S° high, loosely floccose or glabrate and covered by the decur- rent prickly margins of the leaves. Leaves pinnatifid, the lower often 6'-8' long, linear-oblong in out
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 16. Cirsium palustre (L.) Scop. Fig. 4651. Marsh Thistle. Carduus palustris L. Sp. PI. 822. 1753. Cirsium palustre Scop. Fl. Cam. Ed. 2, 2: 128. 1772. Annual or biennial; stem little branched, 4°-S° high, loosely floccose or glabrate and covered by the decur- rent prickly margins of the leaves. Leaves pinnatifid, the lower often 6'-8' long, linear-oblong in outline, the segments lobed, loosely floccose beneath, spinulose; heads usually many, rather less than 1' broad, densely clustered, short-peduncled, the involucre ovoid, its bracts with very short, prickly tips. Woodlands, East Andover, New Hampshire, recorded as thoroughly naturalized. Native of Europe and northern Asia. Summer. Cirsium canum (L.) Bieb., with larger, long-peduncled heads, the decurrent leaf-bases merely ciliate, is recorded as established in Massachusetts. Adventive from Europe. 105. CARDUUS [Vaill.] L. Sp. PI. 820. 1753. Herbs resembling Cirsium in habit, usually annual or biennial, the leaves decurrent on the stem and branches as spiny wings, the heads often nodding. Involucre ovoid to globose, many-flowered, its bracts narrow, in many series. Receptacle copiously bristly, flat or convex. Corolla-tube slender, the limb deeply 5-cleft. Filaments papillose-pubescent. Anthers sagit- tate at the base and with slender auricular appendages. Style-branches obtuse. Achenes mostly obovoid, sometimes angled or ribbed, glabrous. Pappus of many naked or merely roughened bristles. [Ancient Latin name of these plants.] About 80 species, natives of the Old World. Type species: Carduus nutans L. Heads solitary at end of stem or branches, nodding. Heads usually several, crowded at ends of winged branches. 1. C. nutans. 2. C. crispus. i. Carduus nutans L. Musk Thistle. Plumele
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
