The Genera of Grasses of the United States With Special Reference to the Econo
The Genera of Grasses of the United States With Special Reference to the Econo
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Haenk, 1; 294, pi. 42. 1830. Only one species de- scribed.
196 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE.
The only species found in the United States is Cathestecwn erec- tum Vasey and Hack. (fig. 116), a stoloniferous perennial with the aspect of Bouteloua texcma but more delicate. This species is known in western Texas from a very few collections, but is more common FIG. HG. Cathestecum erectum. Plant, X I ; group of spikelets (reduced spike), central spikelet, and fertile floret, X 5.
in... northern Mexico. Cathestecum is placed by Bentham 1 doubt- fully in the tribe Zoysieae, and by Hackel 2 in the tribe Festuceae. Griffiths 3 shows its affinity to Bouteloua and places it in the tribe Chlorideae.
1 Benti-. And Hook. Gen. PI. 3: 1122. 1883. 2 Engl. And Prantl, Pflanzenfam. 2 2 : 65. 1887. 3 Contr. U. S. Nat, Herb. 14: 358. 1912, GENERA OF GRASSES OF THE UNITED STATES. 197 97. MUNROA Torr.
Spikelets in pairs or threes on a short rachis, the lower one or two larger, 3 or 4 flowered, the upper 2 or 3 flowered, the group (reduced spikes) inclosed in the broad sheaths of short leaves, usually about 3 in a fascicle, forming a cluster or head at the ends of the branches; rachilla disarticulating above the glumes and between the florets ; glumes of the lower 1 or 2 spikelets equal, 1-nerved, narrow, acute, a little shorter than the lemmas, those of the upper spikelet unequal, the first much shorter or obsolete; lemmas 3-lierved, those of the lower spikelet coriaceous, acuminate, the points spreading, the midnerve extended into a mucro, those of the upper spikelet mem- branaceous ; palea narrow, 2-nerved, inclosing the oval, dorsally com- pressed caryopsis.
What to read after The Genera of Grasses of the United States With Special Reference to the Econo?
You can find similar books in the "Read Also" column, or choose other free books by A S Albert Spear Hitchcock to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Haenk, 1; 294, pi. 42. 1830. Only one species de- scribed.
196 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE.
The only species found in the United States is Cathestecwn erec- tum Vasey and Hack. (fig. 116), a stoloniferous perennial with the aspect of Bouteloua texcma but more delicate. This species is known in western Texas from a very few collections, but is more common FIG. HG. Cathestecum erectum. Plant, X I ; group of spikelets (reduced spike), central spikelet, and fertile floret, X 5.
in... northern Mexico. Cathestecum is placed by Bentham 1 doubt- fully in the tribe Zoysieae, and by Hackel 2 in the tribe Festuceae. Griffiths 3 shows its affinity to Bouteloua and places it in the tribe Chlorideae.
1 Benti-. And Hook. Gen. PI. 3: 1122. 1883. 2 Engl. And Prantl, Pflanzenfam. 2 2 : 65. 1887. 3 Contr. U. S. Nat, Herb. 14: 358. 1912, GENERA OF GRASSES OF THE UNITED STATES. 197 97. MUNROA Torr.
Spikelets in pairs or threes on a short rachis, the lower one or two larger, 3 or 4 flowered, the upper 2 or 3 flowered, the group (reduced spikes) inclosed in the broad sheaths of short leaves, usually about 3 in a fascicle, forming a cluster or head at the ends of the branches; rachilla disarticulating above the glumes and between the florets ; glumes of the lower 1 or 2 spikelets equal, 1-nerved, narrow, acute, a little shorter than the lemmas, those of the upper spikelet unequal, the first much shorter or obsolete; lemmas 3-lierved, those of the lower spikelet coriaceous, acuminate, the points spreading, the midnerve extended into a mucro, those of the upper spikelet mem- branaceous ; palea narrow, 2-nerved, inclosing the oval, dorsally com- pressed caryopsis.
What to read after The Genera of Grasses of the United States With Special Reference to the Econo?
You can find similar books in the "Read Also" column, or choose other free books by A S Albert Spear Hitchcock to read onlineMoreLess
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