ROSE—MEXICAN AND CENTRAL AMERICAN PLANTS. 291 
NOTE BY DR. HOLM. 
Among the Mexican Cyperaceae collected and described by Liebmann in the Royal 
Danish Academy of Sciences (1851) is a species of Carex which he named pinetorian 
on account of its occurrence in pine woods. It was found on the voleano Orizaba at 
an altitude of about 12,000 feet. This species is also represented in Mr. Rose’s col- 
lection from Popocatepetl, Mexico (1901), from the same elevation, and the specimens 
agree well with the diagnosis as drawn by Liebmann. It seems, however, as if the 
species has been somewhat misunderstood by various authors, hence I take the 
opportunity to call attention to some of its characteristics besides giving some data 
as to its supposed synonymy. Mr. Rose’s specimens show a horizontally creeping 
rhizoma (fig. a) and the perigynia (fig. e) exhibit a narrow wing along the upper 
half of the margins besides a few faintly visible veins at the base, characters that 
have also been pointed out by Liebmann (1. ¢.), and by which it seems well dis- 
tinguished from C. orizabae Liebm. 
Nevertheless, our plant has been confused with Carex festiva Dew. and CL straminea 
Schk., besides having been considered identical with C. orizabae Liebm. The sup- 
posed synonymy may be summarized as follows: 
Carex festivca Dew. forma humilis (Bockeler, Engler’s Bot. Jahrb. 1: 364. 1881). 
Carex festiva Dew., C. propinqua Nees, C. oreades C. A. Mey. (Hemsley, Biol. Centr. 
Am, 3: 473. 1885). 
Carex straminea Willd. var. australis Bailey (Bailey, Mem. Torr. Club 1: 28. 1889). 
That our plant is distinct from (. festira Dew. is readily to be seen from the hori- 
zontally creeping rhizome and the narrowly winged and faintly nerved perigynium. 
In C. festiva the rhizome is, as far as known, always cespitose and the perigynium 
prominently winged and nerved through the whole of its length, a structure which 
is very conspicuous not only in typical ( festiva (fig. f), but also in its varieties 
haydeniana (Olney) Boott (fig. g) and decumbens Holm (tig. h). It seems also very 
strange that C. pinetorum could be referred to (. sframinea, of which the perigynium 
(fig. i) does not show the narrow, elliptical outline observable in C. pinetorum, but 
is broadly ovate, winged, conspicuously nerved, and bidentate at the apex, while in 
C. pinetorum the orifice of the beak is obliquely cut and only slit on the outer con- 
vex face. 
Carex pinetorum Liebm. is no doubt a good species, but it is very unfortunate that 
Liebmann, as it seems, overlooked the fact that the name had been applied before 
by Willdenow to another species, which by Kunth is considered identical with 
Schkuhr’s Carex muhlenbergii. Uf it, therefore, be deemed necessary to change the 
name proposed by Liebmann, I suggest Carexc peucophila. 
EXPLANATION OF PLATE LXIII.—Fig. a, entire plant; 6, inflorescence of the same; ¢, scale of stam- 
inate spike of C. peucophila; d, scale of pistillate spike of the same; e, perigynium of the same; /, 
perigynium of C. festiva Dew.; g, perigynium of (. festiva haydeniana (Olney) Boott; h, perigynium of 
C. festiva decumbens Holm; i, perigynium of C. straminea Schkuhr. Figs. a and b, natural size; ¢ to ¢, 
much magnified. 
BETULACEAE. 
NOTES ON OSTRYA,”“ WITH TWO NEW SPECIES. 
Before L888 only two species of Ostrya were known—one of them 
OJ ostrya (O. carpinifolia) of the Old World, and the other (. e/r- 
giniana of the new. Since then two species have been described— 
O. knowltoni, from Arizona, and O. japonica, from Japan. Our com- 
@ The generic name can be clearly traced back to the Romans, among whom it was 
used by Pliny and others, Our present method of citing it would be as follows: 
QOstrya (Micheli) Scop. Fl. Carn. 414. 1760. 
Type species, Carpinus ostrya L. Sp. Pl. 2: 998. 1753, 
