Volume 6 January 31, 1910 



MUHLENBERGIA 



THREE NEW ERIOGONUMS 

 By Edward L. Greene 

 Eriogoniim cyclosepalum sp. nov. 



Annual, allied to E. Abertianum, as stout and woody at 

 base, but low, commonly no more than 5 or 6 inches high, erect- 

 spreading-, the bushy width of the mature plant nearly or quite 

 equal to its height, floriferous throughout almost from the very 

 base, dull-green by a thin villous pubescence, but young plants 

 rather heavily villous-tomentulose: basal leaves on long slender 

 petioles, the blades about ^ inch long, nearly as broad below 

 the middle, broadly ovate, or cordate-ovate, acute; those verti. 

 cillate on the stem successively smaller, narrow, the distinction 

 of blade and petiole obsolete in those of the upper verticils: seg- 

 ments of the involucres elongated greatly, several times longer 

 than the body, equalling the flowers or surpassing them: outer 

 sepals seemingly orbicular, the basal sinus closed, in maturity 

 dull crimson, though in anthesis only cream-colored with a tinge 

 of red. 



A common species of open plains and table lands in New 

 Mexico, and from an early period confused with E. Abertianum. 

 The oldest specimens before me were collected in western Texas 

 by Charles Wright as long ago as 1849; an ^ next these, in point 

 of time, are two sheets of Charles Wright's number 1761, gath- 

 ered in New Mexico in 1851 or 1852; and all these specimens 

 of Wright's gathering are in the U. S. Herbarium labelled in Dr. 

 Torrey's handwriting Eriogonum Abertianum. The one sheet 

 of these three which exhibits young and hoary specimens is 

 noted in the same hand, "forma tomentosa" but, as I have said 

 above, the young plants are always tomentulose, the old, or even 

 the well matured, are never so. 



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