The Plant World Volume 22

The Plant World Volume 22

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: the Lower Transition Zone. Much commoner at lower levels. Artemisia tridentata Nutt. Very common in dry ground in the Lower Transition Zone on the north side of the mountain, but not known to occur on the south side. Noted at fOOO ft. alt. Artemisia Ludoviciana Nutt. Common in Prairie Fork and on the ridges surrounding it, also in the higher part of North Fork Lytle Creek. Dry ground under the pines throughout the Transition Zone, alt. 6000-8500 ft. Very variable in pubescence and in habit. Some plants are permanently tomentose above, although much less so than below, while other plants are glabrate above. All our plants, however, agree in having the leaves pinnately cleft into narrow lobes. Dr. Rydberg has determined our No. 1651 as A. diversifolia Rydb. (No. 1651.) Lcpidospartum squamatum Gray. Occasionally found in the lower portions of the Transition Zone, usually dry sandy cafton beds. (No. 1717.) Tetradymia canescens DC. Quite common throughout the Transition Zone on the north side of the mountain. Two plants were noted on the south spur of Telegraph Peak, the only noted station on the south side. Several shrubs grow by the summit cairn on Pine Mountain and therefore at an altitude of 9660 ft. alt. (Nos. 1545,1672.) Senecio ionophyllus Greene. (S. sparsilobatus Parish. S. bernardinus Greene.) This very variable species is frequent under the pines on shaded north-facing slopes, especially in the Upper Transition Zone. It was noted chiefly on the side of the mountain facing the desert, only noted on the south slope of the mountain in Cascade Fork of San Antonio Canon. The most common form of the plant is f. sparsilobatus (Parish) comb. nov. This form, and several others which, although not altogether typical, are best referred...
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Product details

  • Paperback | 80 pages
  • 189 x 246 x 4mm | 159g
  • United States
  • English
  • black & white illustrations
  • 1236937503
  • 9781236937506