216 UNITED STATES AND MEXICAN BOUNDARY. 
- serrate-lacerate, scarious. 了 Perianth white; the segments obovate, concave. . Ovary ovate, 
obtusely triangular, one-celled, with 6 anatropous erect ovules at the base of the cavity. Fruit 
coriaceous, narrowly winged, indehiscent. Seed 3-sided, with obtuse angles, smooth. Embryo 
cylindrical, in the axis of horny albumen, which it nearly equals in length. D. Texanum 
Scheele, seems to be hardly distinct from this species. 
DASYLIRION DBIGELOVII， Torr. Bot. Whipp. Rep. р. 151. Sierra del Tule y Tinaja Alta, Sonora; 
Schott. **Stem 6 feet high, and 2-3 feet in diameter." Leaves 3-5 feet long, and nearly an 
inch in diameter about the middle, flat; the margin a little rough, and sometimes separating 
into threads. ‘‘ Scape 6-8 feet long. Raceme 1-12 foot long, and nearly a foot in diameter at 
the base." Fruit papyraceous, l or 2*of the cells usually sterile, not opéning by regular 
dehiscence, but by the rupture of the thin walls. Seeds oblong-obovate, whitish, dull, slightly 
reticulated. Embryo slender, cylindrical, in the axis of horny albumen. 
DASYLIRION LINDHEIMERIANUM, Scheele in Linnea, 25, р. 362. High plains and hill sides near 
the Copper Mines, New Mexico; Bigelow. El Podrero, Sonora; Schott. (No. 693, Wright, 
Хо, 213, 297, 551, 552, Lindheimer.)—2A]l our specimens are in fruit. Leaves a yard long, and 
about 3 lines wide towards the base, channelled above, rounded underneath.  Pedicels filiform, 
thickened and triangular at the base of the flower. Fruit membranaceous, nearly twice as 
broad as long, and exceeding the pedicels in length, conspicuously 3-winged, only one of the 
cells usually fertile, and this containing but a single obovate seed.— This species seems to be 
very like D. Hartwegianum, Kunth. D. Bigelovii, which it also resembles, differs in its much 
larger fruit, broader leaves, and short pedicels. 
DASYLIRION ERUMPENS (n. sp.): foliis lineari-ensiformibus e basi non te superne 
angusto-filiformibus supra canaliculatis infra semiteretibus margine serrulato-scabris ;-spathis 
e basi lata longissime angustissimeque attenuatis; pedicellis vix flore equalibus; fructibus 
trilobis trilocularibus lobis carinatis vix alatis ; seminibus globosis, Hills and gravelly places, 
western Texas and New Mexico, June. (No. 1918, Wright.) Leaves 24-3 feet long, about 3 
lines wide toward the base, tapering to a long, almost filiform extremity, rigid; the margin 
rough, with minute cartilaginous serratures. Panicle compound; the spathaceous bract at the 
base of each primary branch dilated and clasping below, then tapering to a long filiform point. 
Pedicels jointed near the middle. Flowers white, about 2 lines long, the male (as usual) 
bearing imperfect anthers, and the female an infertile ovary. Capsule with one or two of the 
cells often without seeds, the angles prominent and acute, but not winged. Seeds when near 
maturity, bursting the pod, and then remaining for some time attached to the placenta. 
IRIDACEAE. я 
IRIS MACROSIPHON, Torr, Bot. Whip. Hep. p. 144. Near San Francisco, and in oon county, 
California, March ; Thurber. 
SISYRINCHIUM Баны Linn. ; var. моовохатим. San Diego, California, Мау; Thurber. ` 
Western Texas; common along the Rio Grande; also in New Mexico, near the Copper Mines. 
8. minus, Engelm. & Gray, (Pl. Lindh., No. 313,) can hardly be considered a distinet species 
from this, as intermediate forms not шйндаглйн occur. 
NEMASTYLIS ACUTA, Engelm. & Gray, РІ. Lindh. 1, p. 27 (adnot.) М. Байн Мий. їп 
Trans. Amer. Phil, Soc. (n. ser.) 5, p. 157. Ixia acuta, Bart. Fl. N. Am. 1, t. 76. Western 
Texas, Thurber* Mountains of Muerte; Bigelow. 
TRIFURCIA CHRULEA, Herb. in Bot. жы sub t. 8779, Prairies of the ачыры Texas ; Wright. 
Ce a ee m 
