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

By John M. Coulter

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

Show description

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

Similar nature & ecology books

Bruce Mueller's Lake Michigan Rock Picker's Guide PDF

An eagerly awaited rock identity advisor for Lake Michigan

Download e-book for kindle: Edge of tomorrow: an Arctic year by Sam Wright

From one of many final nice wildernesses -- the Brooks variety of Alaska, 100 miles contained in the Arctic Circle -- Sam Wright speaks to an rising view of nature as an interconnected, dynamic complete. dwelling in a hand-built, 12'-by-12' cabin, Wright documents seasonal adjustments and his concepts as he and his spouse dwell a yr in isolation and contemplation.

The Art of Science - download pdf or read online

Reliable technology isn't really inevitably a booklet approximately nice clinical theories, complex equations, or grand outdated males (or girls) of their laboratories; as an alternative, it’s concerning the locations we draw our suggestion from; it’s approximately day-by-day exercises and unexpected flashes of perception; approximately commitment, and – occasionally – desperation; and the small moments, questions, quests, clashes, doubts and delights that make us human.

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

Ordinarily remembered for his library and for his biblical feedback, Isaac Vossius (1618-1689) performed a valuable position within the early glossy ecu international of studying. Taking his cue from the not likely bedfellows Joseph Scaliger and Rene Descartes, Vossius released on chronology, biblical feedback, optics, African geography and chinese language civilization, whereas accumulating, annotating and promoting one of many century's most useful libraries.

Additional info for A Preliminary Revision of the North American Species of Cactus...

Example text

1893. The extreme specific and varietal forms seem worthy of specific distinction, but abundant growing material in Mo. Bot. Gard. showed such complete intergradation that a specific line of separation was found to he impossible. The varietal form is said to be an important one in the ceremonial rites of the Indians. GEOGRAPHICAL DISTRIBUTION. These forms are evidently Mexican in origin, and the specimens seen are all from the Rio Grande region. They have crossed that river below the “Great Bend,” and probably belong to lower-lying, more eastern Mexican provinces than do the species of Anhalonium.

Engelmaun’s types and unpublished notes. It may be well to repeat the statement here that all known forms within the United States have been included, but only such Mexican and West Indian forms as could be personally examined. A maze of names and descriptions have been handed down in various writings, but it would be of no advantage to introduce them except as substantiated by specimens. John M. Coulter. University Of Chicago. 355 ECHINOCACTUS, CEREUS, AND OPUNTIA. 4. ECHINOCACTUS Link & Otto, Verb.

Pl. Fendl. 49 (1849), not Haw. (1819). Mamillaria radiosa Engelm. Pl. Lindh. 196 (1850). Mamillaria vivipara radiosa texana Engelm. Syn. Cact. 269 (1856). 5 cm. high and about 5 cm. in diameter, simple or sparingly proliferous: tubercles terete, more or less grooved above, 8 to 12 mm. long: radial spines 20 to 30, straight, slender, white with dusky apex, very unequal, 6 to 8 mm long; central spines 4 or 5, stouter, yellowish or tawny, 8 to 12 mm. 5 cm. long, about the same diameter when fully open, violet to dark purple: stigmas 7 to 9, obtuse: fruit oval and green: seeds yellowish or brown, obovate, pitted, fully 2 mm, long.

Download PDF sample

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

by Donald

Rated 4.87 of 5 – based on 49 votes