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Pittonia

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    Available in PDF Format | Pittonia.pdf | Unknown
    Edward Lee Greene
Excerpt from book: Notes On Mach.eranthera. At page 60 of the preceding volume I named, and pave an outline of the characters of M. montana, recording at the same time my suspicion that it would be found an aggregate of several good species. Since the time of that writing I have again visited the habitats of several of these plants: have also examined, in the herbarium of Columbia College, several of Nuttall's specimens not seen by me before: and lastly, Professor Nelson of the Wyoming University has sent me copious material from those high plains where Nuttiill himself collected so long ago. I am thus much better equipped than I was three years ago, for the work of identifying, and more fully describing certain of Nuttall's Dieterias, most of which fall, according to my view, into the genus Machseranthera. M. Viscosa. Dieteria viscosa, Nutt. Trans. Am. Phil. Soc. vii. 301. M. montana, Greene, Pitt. iii. 60, in part. Biennial: the stems solitary or several, erect, 1 to 2 feet high, usually spicate or racemose in the middle, but more corymbose at summit, or not rarely wholly corymbose: herbage green and seemingly glabrous, but under a lens puberulent, the inflorescence and especially the involucres glandular and viscid: lower cauline leaves narrowly oblanceolate, rather remotely but sharply serrate: bracts of the large and nearly turbiuate involucre in 5 or 6 series and closely imbricated, their green herbaceous tips long and narrow, closely reflexed and very viscid: rays rich purple, IS or 20: achenes much compressed, the faces rather obscurely striate under the thin coat of appressed silky pubescence. Plentiful on plains of the Platte in northern Colorado: the above description based on specimens collected by myself at La Salle, in 1896. The herbage is, as Nuttall said, fragrant: the odor ...  
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  • PDF | 230 pages
  • Edward Lee Greene
  • General Books LLC
  • Unknown
  • 10
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