flora area, and it averages 2,430–18,600 µg/g dry weight (R. D. Reeves et al. 1981; A. R. Kruckeberg and Reeves 1995). None. None. window.propertiesFromHig
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evolution (G.L. Stebbins 1950), as well as plant speciation (V.Grant 1971, 1981). The minority of exceptions to this rule are usually regarded as species
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in Physaria. Publ. Bussey Inst. Harvard Univ. 1979: 65–77. Rollins, R. C. 1981b. Studies in the genus Physaria (Cruciferae). Brittonia 33: 332–341. Physaria
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flora). Didymodon rigidulus in the broad sense, as emended by R. H. Zander (1981b) is polymorphic, with several varieties distinguished by fairly good correlations
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while the highest number (n = 34) came from Manitoba (Á. Löve and D. Löve 1981b). Records of Carex brevior from ruderal habitats east and south of its main
5 KB (580 words) - 21:42, 5 November 2020
historically recognized segregate species or infraspecific taxa (C. E. Nauman 1981b; J. K. Small 1933). However, the characters artificially selected for differentiating
5 KB (471 words) - 20:22, 9 December 2022
fruit is unlikely to be Tortella humilis. H. A. Crum and L. E. Anderson (1981) well described and illustrated the rare species Trichostomum spirale from
7 KB (860 words) - 22:28, 5 November 2020
though reported from there by many authors (often as D. trifarius, see Zander 1981). It differs in the triangular leaves and the smooth, more homogeneous and
6 KB (653 words) - 22:28, 5 November 2020
in the Flora of North America is the "integrated system" of A. Cronquist (1981, slightly modified in 1988). Among other modern systems, the integrated system
63 KB (9,890 words) - 23:57, 13 February 2019
a sheath. The chromosome number (2n = 64) reported by Á. Löve & D. Löve (1981b) is probably erroneous. None. None. window.propertiesFromHigherTaxa=[{"rank":"section"
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C.F. Millspaugh (1892) described 180 plants as so used. T.Arnason et al. (1981) have provided a recent treatment of the plants used for medicine in eastern
20 KB (2,752 words) - 23:04, 13 February 2019
agriculturalists (e.g., T.M. Barkley 1983; Illinois Agricultural Experiment Station 1981; C.Frankton and G.A. Mulligan 1970). The Weed Science Society of America
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many specimens though also found in taxa of the Dicranaceae (R. H. Zander 1981b), some of which may belong in Pottiaceae (O. Werner et al. 2004). None.
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migrating birds, the species did not persist in South America (J. L. Reveal 1981b). The divergent wild buckwheat was used ceremonially by the Navajo (Diné)
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count of 2n = 44 reported for R. rhaponticum from Wisconsin (N. A. Harriman 1981b) probably is from R. rhabarbarum. Many rheums have culinary and medicinal
4 KB (479 words) - 23:07, 5 November 2020
divided the traditional family into three or more families). A. Cronquist (1981) placed Asteraceae as the only family in the order Asterales within subclass
270 KB (5,940 words) - 20:46, 31 January 2022
much of the area. The specimens were misplaced, however, and unstudied until 1981, although Catesby's collections in the Sherardian Herbarium at Oxford had
104 KB (16,916 words) - 22:44, 13 February 2019
Good 1974; G.T. Trewartha and L.H. Horn 1980; F.I. Woodward 1987; E.O. Box 1981; M.J. Müller 1982; A.L. Takhtajan 1986; R.Hengeveld 1990; see also D.Steila
99 KB (16,474 words) - 17:24, 13 February 2019
Kelso Dunes of the eastern Mojave Desert in California (R.F. Thorne et al. 1981) listed 783 species with 717 of them indigenous. P.H. Raven and D.I. Axelrod
66 KB (9,996 words) - 22:24, 13 February 2019