Download e-book for iPad: A Preliminary Revision of the North American Species of by John M. Coulter

By John M. Coulter

Contributions from the U.S. nationwide Herbarium, 1894.

Show description

Read Online or Download A Preliminary Revision of the North American Species of Cactus... PDF

Similar nature & ecology books

Gene Stratton-Porter's Coming through the swamp: the nature writings of Gene PDF

E-book by means of Stratton-Porter, Gene, Plum, Sydney Landon

New PDF release: Hartshorne and the Metaphysics of Animal Rights

Charles Hartshorne is among the optimal metaphysicians and philosophers of faith within the 20th century. He has written largely on animals, either as a thinker of nature and as a professional on poultry track. because the booklet of inventive Synthesis and Philosophic approach in 1970, he has committed loads of consciousness to animals.

Get Techniques in sedimentology PDF

The innovations to be had for the research of sediments and sedimentary rocks shape the focal point of this e-book. whereas box points are integrated, larger emphasis is put on the laboratory exam of sediments. each one bankruptcy offers introductory heritage fabric after which proceeds to a dialogue of process, the apparatus, and its boundaries.

Eric Jorink, Dirk Miert's Isaac Vossius (1618–1689), between science and scholarship PDF

In general remembered for his library and for his biblical feedback, Isaac Vossius (1618-1689) performed a significant function within the early smooth ecu global of studying. Taking his cue from the not going bedfellows Joseph Scaliger and Rene Descartes, Vossius released on chronology, biblical feedback, optics, African geography and chinese language civilization, whereas amassing, annotating and promoting one of many century's most dear libraries.

Extra resources for A Preliminary Revision of the North American Species of Cactus...

Sample text

277 (1856). Echinocactus laticostatus Engelm. & Bigel. Pacif. R. Rep. iv, 32 (1856). Glaucous, depressed-globose or at length ovate or even cylindric with age, 4 to 20 cm. 5 to 15 cm. in diameter, simple: ribs 8 to 10 (fewer in very young specimens), often spirally arranged, the tubercles scarcely distinct by inconspicuous transverse grooves: spines 6 to 9, stout, compressed, reddish (at length ashy), recurved or sometimes almost straight, nearly equal, 2 to 4 cm. long (sometimes long and slender and almost terete, sometimes short, stout and broad); radials 5 to 8, upper ones weaker, lowest wanting; a single stouter decurved central (sometimes wanting): flowers pale-rose to purple, 6 cm.

13 (1827). —Astrophytum Lem. (1839); Gymnocalycium Pfeiff. (1844); Malacocarpus Salm-Dyck (1850). † As the genera of Cactaceæ have no very definite boundaries it is to be expected that Echinocactus will be found merging into neighboring genera. The mamillate forms, such as E. simpsoni, are clearly intermediate between Cactus and Echinocactus, but are nearer the latter in what are considered the more essential characters; while the oval and cylindric forms look toward certain species of Cereus, though the general globose outline is well maintained.

Among the Mexicans both E. wislizeni and E. ” 16. Echinocactus wislizeni albispinus Toumey, Gard. & For. viii, 154 (1895). Differs from lecontei in being oblong, and in the much fewer radials (11 in all, 2 upper and 3 to 5 lower rigid, and 2 or 3 laterals on each side flexuous), all of which (or only the flexuous ones) are whitish. (Ill. l. )—Type in Toumey Herb. Southern Arizona and Lower California. Specimens examined: Arizona (J. W Toumey of 1892, near Tucson) Lower California (M. E. ) There can be no doubt but that this form with much fewer radial spines occurs throughout the range of lecontei, to which it is most closely allied.

Download PDF sample

A Preliminary Revision of the North American Species of Cactus... by John M. Coulter


by Brian
4.0

Rated 4.04 of 5 – based on 45 votes