. 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 102nd meridian. Genus 41. THISTLE FAMILY. I. Gifola germanica (L.) Dumort. Cudweed. CottonRose. Herb Impius. Fig. 4389. Gnaphalium germanicum L. Sp. PI. 857. germanica L. Sp. PI. Ed. 2, 1311. germanica Dumort. Fl. Belg. 68. 1827. Annual, erect, cottony, 4-i8 high, simple, or branched atthe base, very leafy. Leaves sessile, lanceolate, linear, orslightly spatulate, ere
. 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 102nd meridian. Genus 41. THISTLE FAMILY. I. Gifola germanica (L.) Dumort. Cudweed. CottonRose. Herb Impius. Fig. 4389. Gnaphalium germanicum L. Sp. PI. 857. germanica L. Sp. PI. Ed. 2, 1311. germanica Dumort. Fl. Belg. 68. 1827. Annual, erect, cottony, 4-i8 high, simple, or branched atthe base, very leafy. Leaves sessile, lanceolate, linear, orslightly spatulate, erect or ascending, obtuse or acutish, 3-i2long; stem terminated by a sessile dense cluster of heads,usually subtended by several leafy branches terminated bysimilar clusters and these often again proliferous; heads 12-30in each cluster, many-flowered; involucre ovoid, light yellow,its bracts mainly acute. In dry fields, southern New York and New Jersey to Pennsylva-nia, West Virginia and North Carolina. Old names , owls-crown, chafeweed, childing cudweed. 42. PLUCHEA Cass. Bull. Soc. Philom. 1817: 31. 1817. Pubescent or glabrous herbs, or some tropical species shrubby, with alternate dentateleaves, and small heads of tubular flowers in terminal corymbose cymes. Involucre ovoid,campanulate, or nearly hemispheric, its bracts appressed, herbaceous, imbricated in severalseries. Receptacle flat, naked. Outer flowers of the head pistillate, their corollas filiform,3-cleft or dentate at the apex. Central flowers perfect, but mainly sterile, their corollas sagittate at the base, the auricles caudate. Style of the perfect flowers 2-cleft orundivided. Achenes 4-5-angled. Pappus a single series of capillary scabrous bristles. [Namedfor the Abbe N. A. Pluche, of Paris.] About 35 species, widely distributed in warm and temperate regions. In addition to the follow-ing, 2 or 3 other indigenous species occurs in the southern United States, and two intr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
