. 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. than the width of the achene ; perennial. 3. T. gracile. I. Thelesperma trifidum (Poir.) Brit-ton. Fine-leaved 4519- Coreopsis trifida Poir. in Lam. Encycl. Suppl. 2 : 353. filifolium A. Gray, Kew. Journ. Bot. I : 252. trifidum Britton, Trans. X. Y. Acad. Sci. 9 : 182. 1890. Annual or biennial; stem branched, i°-3°high. Leave
. 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. than the width of the achene ; perennial. 3. T. gracile. I. Thelesperma trifidum (Poir.) Brit-ton. Fine-leaved 4519- Coreopsis trifida Poir. in Lam. Encycl. Suppl. 2 : 353. filifolium A. Gray, Kew. Journ. Bot. I : 252. trifidum Britton, Trans. X. Y. Acad. Sci. 9 : 182. 1890. Annual or biennial; stem branched, i°-3°high. Leaves numerous, not rigid, i¥-2 longf,bipinnately divided into filiform or linear-filiform segments; heads several or numerous,I2-I5 broad; outer bracts of the involucreabout 8. subulate-linear, equalling or morethan half as long as the inner, which areunited not higher than the middle; rays 6-10,somewhat spatulate. 3-lobed; disk purple orbrown; achenes linear-oblong, straight, orslightly curved, the outer ones strongly papil-lose; awns of the pappus not longer than thewidth of the summit of the achene. In dry soil. South Dakota, Missouri and Ne-braska to Colorado, Texas, New Mexico and north-ern Mexico. Genus yi. THISTLE FAMILY. 501 2. Thelesperma intermedium Thelesperma. Fig. 4520. Thelesperma intermedium Rydb. Bull. Torr. Club27: 631. 1900. Perennial from a deep woody root and slen-der rootstocks; stem rigid, usually muchbranched, i°-il° high. Leaves usually numer-ous, ii-2 long, bipinnately divided into entire,rigid, linear segments, but less compound thanthose of the preceding species; outer bracts ofthe involucre lanceolate-subulate, usually muchshorter than the inner ones, which are unitedto about the middle; rays and achenes similarto those of the preceding. In dry soil, on plains, Nebraska and Wyomingto Colorado and New Mexico. In our first editionincluded in T. ambiguum A. Gray, of the South-west. June-Aug.
Size: 1385px × 1803px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
