ZACATON" AS A PAPEE-MAKING MATERIAL. 5 



which he called Crypsinna, based in part on the Crypsis of Humboldt, 

 Bonpland, and Kunth, 1 and in part on the China of Kunth. As 

 established by Fournier, Crypsinna included the species stricta, ma- 

 croura, and setifolia. In November, 1881, Bentham, 2 having seen a 

 proof or a copy of Fournier's work before its publication, disagreed 

 with him and assigned the species macroura and stricta "both to 

 macroura in the genus Epicampes Presl. 



The following characterization of Epicampes macroura has been 

 translated from the original Latin description by Humboldt, Bon- 

 pland, and Kunth: * 



Crypsis macroura. Culm erect, simple, glabrous; leaves and sheaths scabrous; 

 panicle spikelike, very long, cylindrical, erect; glumes equal, [floret] nearly as long 

 as the glumes. Found on the sunny side of a mountain in the State of Mexico near the 

 mountain of Toluca, at an altitude of 11,000 feet. Flowers in September. 



Fig. 2. — Cross section of part of a culm from the epidermis to the central cavity, X 320, showing 

 hypodermal stereome, two mestome strands, and colorless parenchyma between them. 



Culms erect, simple, 3 or 4 feet tall, glabrous, pubescent below the glabrous nodes. 

 Leaves narrowly linear, convolute (?), striate, slightly scabrous. Sheaths rather lax, 

 striate, glabrous, longer than the internodes. Ligule very long, less than 1 inch, bifid 

 (2-cleft), glabrous, the lobes acuminate. Panicle spikelike, dense, cylindrical, 

 strictly erect, 1 foot long. Spikelets pediceled, the pedicels scabrous. Glumes linear, 

 acuminate, carinate, subequal, nearly glabrous, ciliate-hispid on the back, green. 

 Floret slightly shorter than the glumes, lanceolate, acute, the lemma and palea concave, 

 equal, slightly scabrous, green; the lemma 3-nerved, the palea 2-nerved, narrower. 



The general appearance of a few culms taken from the tufts in 

 which this grass usually grows is shown in figure 1, which was drawn 

 from a herbarium specimen. Figures 2 to 6, inclusive, show the 

 microscopical structure of the zacaton plant.' 1 The appearance of 

 as average and two small-sized tufts is shown in figure 7 These 



i Humboldt, Alexander, Bonpland, A. J. A., iiii'l K until, K. S. Nova Oneniel, Species I'liinliiniin . . 



i. i, p. 140 in. Lutetla Pari lorum, 1816. 

 i Bentham, Oeorge. Mote on Qramlnes. In Jour. Linn. Sue [ London], Bot., v. 19, p, 87 88, 1881. 

 i Tii<- drawing for figures 1, 2, 3, 4, 6, 6, and 11 were made bj Dr. Theodor Holm. 



