Contributions from the United States National Herbarium Volume N . 17

Contributions from the United States National Herbarium Volume N . 17

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ...Fl. Nov. Holl. 169. 1810. Key To The Species. Plants annual. Glumes unequal, the second as long as the spikelet, the first half as long 5.5. macrospermus. Glumes subequal. Glumes about as long as the spikelet, 2 mm. long, smooth; spikelets often nodding on the capillary pedicels 1. S. shepherdi. Glumes shorter than the spikelet, 1 mm. long or less. Pedicels short, uniformly rather thick, the spikelets appressed along the main branches of the panicle; glumes smooth, very short, ob tuse.. 3. S.ramulosus. Pedicels capillary. Pedicels thickened below the spikelet, all longer than the spikelets; panicle more than half the entire height of the plant; glumes often pilose 2. S. confusus. Pedicels not conspicuously thickened, the ulti-mate lateral ones shorter than the spike-lets; panicle less than half the height of the plant 4.5. minutiflorus. Plante perennial. Plante producing creeping rhizomes. Inflorescence spike-like; blades firm, pungently in-volute-pointed 21. S. virginicu-. Inflorescence a diffuse capillary panicle; blades flat, rather lax. Ligule 1 to 2 mm. long, auricled 6. -S. auriculatus. Ligule minute, not auricled 7. S. asperifoliu-. Plants tufted, not producing creeping rhizomes. Panicle large and open, the branches ascending, the lower 10 to 15 cm. long. Blades scabrous, elongated, the tip involute-attenu-ate; plants 1 to 2 meters high, in large tus-socks 8. S. wrightii. Blades smooth, glaucous, lees than 10 cm. long; plants less than 1 meter high 9. S. palmen. Panicle narrower or more delicate. Panicle long and narrow, the branches appressed. Second glume shorter than the spikelet, little longer than the first; panicle densely flowered; spikelets about 2 mm. long... 17. S. indicia. Second glume about as long as the...
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Product details

  • Paperback | 354 pages
  • 189 x 246 x 19mm | 630g
  • Miami Fl, United States
  • English
  • Illustrations, black and white
  • 1236655559
  • 9781236655554