. 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 82. THISTLE FAMILY. 509 2. Tetraneuris stenophylla Rydb. Narrow-leaved Tetraneuris. Fig. 4538. Tetraneuris stenophylla Rydb. Bull. Torr. Club 33: Perennial with a branched caudex, the branchesoften 3^ long, the upper portion covered with thescarious bases of old leaves. Bases of the leavesdilated, sparingly silky-villous; blades narrowly lin-ear. i-i2 long, ab
. 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 82. THISTLE FAMILY. 509 2. Tetraneuris stenophylla Rydb. Narrow-leaved Tetraneuris. Fig. 4538. Tetraneuris stenophylla Rydb. Bull. Torr. Club 33: Perennial with a branched caudex, the branchesoften 3^ long, the upper portion covered with thescarious bases of old leaves. Bases of the leavesdilated, sparingly silky-villous; blades narrowly lin-ear. i-i2 long, about i wide, glabrous, conspicu-ously punctate; scape 2-4 high, minutely strigose;involucre s-? wide; bracts oval or oblong-acutish;rays about 5 long and 2 wide. In dry soil, Kansas to Colorado and Mexico. Formerlyconfused with T. scaposa (DC.) Greene. Tetraneuris fastigiata Greene, of Kansas, differs bythe leaf-bases and involucre being more densely pubes-cent ; it is known only from imperfect specimens, andmay not be distinct from T. stenophylla, over which ithas priority of
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
