Muhlenbergia . n fromthis source is common. Coppice growth is also produced, butis less common. The tree grows slowly. Apart from its valueas a source of fuel, this tree is of considerable importance as aground cover for the dry slopes on which it is most plentiful. TWO XKVV SPECIKS OF CARDliUS FROM COLORADORv Gkorof. E. Ostrrhoitt / iii<mI<vs( sp. nov. .\ biennial or short lived perennial, 6 to 8dm. high, slightlyarachnoid , branching above the middle into severalslender branches, very leafy: the lower leaves oblanceolate, i to2 dm. long, pinnatelv parted into nu
Muhlenbergia . n fromthis source is common. Coppice growth is also produced, butis less common. The tree grows slowly. Apart from its valueas a source of fuel, this tree is of considerable importance as aground cover for the dry slopes on which it is most plentiful. TWO XKVV SPECIKS OF CARDliUS FROM COLORADORv Gkorof. E. Ostrrhoitt / iii<mI<vs( sp. nov. .\ biennial or short lived perennial, 6 to 8dm. high, slightlyarachnoid , branching above the middle into severalslender branches, very leafy: the lower leaves oblanceolate, i to2 dm. long, pinnatelv parted into numerous triangular divisions,these tipped with rather small spines; the upper smaller, lan-ceolate and less divided, all thin, whitish tomentose beneath,glabrate above, moderately decnrrent on the stem, the claspingbase expanded and prickly; heads subtended by a leafy bract,numerous and small, about 15mm. high, the bracts stout for thesize of the head, xotnrw lint woolK- , the outermost short Plate Quercus Douglasii. Hills near ()roviHe, California. May 19, 1913 55 and flat, the second series prolonged into a stout spine, thick-ened upward and equaling the inner in length, the inner onesweaker and unarmed: flowers whitish: pappus brown and plu-mose. Collected along Thompson river in the canyon just east ofEstes Park, Larimer county, Colorado, August 23, 1912, I suppose the relationship of this Carduus is with (Gray) Greene, and C. spathiilatus Osterhout, butthe small heads and long thickened bracts, not at all fimbriate,separate it from these. The long bracts might suggest C. gri-seus Rydb., but C. modestus is a much more slender plant withsmaller heads, and the long bracts are not flat as they are in In his account of some hybrid thistles in Bull. Torr. Club37: 5S4, Dr. Rydberg made a plant which I collected here ahvbiid of C. griseiis and C. laterifolius, but I should say thatthe lubiid is rather of C. modestus and probably C. a)
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