214 UNITED STATES AND MEXICAN BOUNDARY. 
high. Leaves 12-15 inches long and 1-12 inch wide, thick, rounded underneath and somewhat 
channelled above, terminating in a stout spine, the margin armed with short strong hooked 
prickles, which are usually reversed. Scape 6-10 feet long, the upper part pretty thickly 
covered with flowers, which are mostly in pairs (the lowest in threes) and arise from very short 
(1-2 lines) forked peduncles or branches. Bracts lanceolate from a broad clasping base, 2 lines 
long, deciduous. The perianth above the ovary is about an inch long, white with a tinge of 
yellow, and the segments are narrowly-oblong. S'amens and style much exserted. Stigma 
clavate, obtuse, obscurely 3-lobed. Capsule about an inch long and half an inch in diameter, 
erect, obtusely triangular, with a short abrupt acumination. Seeds in a double series, semior- 
bicular, compressed vertically, black and shining. We cannot identify this species among those 
described by Kunth and later writers. The fibres of the leaves are used for making coarse ropes, 
` bagging, etc. 
AGAVE GEMINIFLORA, Gawl. in Brand's Jour. Sc. 1, t. 1? var. Sonora: foliis angusto-lineari- 
bus elongatis crebris.superne concavis, subtus rotundatis, apice terretibus convolutis in spinam 
"mE 
terminalem excurrentibus, margine filamentosis ; spica longissima, floribus per paria approxi- 
matis; perigoniis (uncialibus) tubuloso-infundibuliformibus.—Sierra del Pajarito, Sonora, 
August; Schott. Leaves all radical, 6-12 inches long and 3-4 lines wide ; the margin splitting 
‘off into very fine white threads and entirely destitute of spines ог serratures. Scape (including 
its spike) 5-6 feet high. The flowers in pairs оп very short erect stalks. The perianth above 
the ovary is about an inch long, with a somewhat funnel-form tube, and narrowly oblong seg- 
ments, which are at first a little spreading, but afterwards erect. Stamens and style exserted 
and the linear anthers, as usual, very large for the size of the flower. 
AGAVE PARVIFLORA (n. sp.): acaulis ; foliis lineari-lanceolatis basi valde dilatatis infra medium 
margine catilagineo-denticulatis, ultra medium filamentosis ; spica elongata ; pedunculis bre- 
vissimis dissitis 2-4-floris; perianthiis (vix semiuncialibus) subcampanulatis, laciniis breviovatis ; 
capsulis subglobosis.— On various sierras of Pimeria Alta, Sonora; Schott. Leaves all in a 
radical cluster, 24-3 inches long and about half an inch wide, thick, much dilated at the base ; 
the margin below the middle furnished with minute but evident cartilaginous teeth, while on 
the upper half the margin bears rather stout white threads ; the spiny tip is not more than 2-3 
lines long. Scape 4—5 feet long ; the clusters of flowers more scattered than in the last species. 
Only the withered persistent flowers were collected. "These when soaked were scarcely half an 
inch long and whitish with a tinge of rose-color. Stamens and style exserted. Capsule 4—5 
lines long and of nearly the same diameter. Seeds as in the last species. This is possibly A. 
filifera, Salm-Dyck, a species of which the flowers and fruit are not described. 
AGAVE VIRGINICA, Linn.; Micha, Fl. 1, р. 187; Kunth, Enum. 5, p. 833. Hills on the Rio 
Эс Grande from El Paso down to Laredo, April—August. (No. 683 and 1905, Wright.) 
I subjoin a description, by Dr. Engelmann, of a species of Agave cant В at Eagle Pass on the 
Rio Grande, (probably "5; арена. of which there аге по specimens in the col- 
lections : 
AGAVE MACULATA (Engelm.): 3 crassa cylindrica nigra ; foliis radicalibus lanceolato- 
linearibus longe acuminatis subtus convexis supra profunde concavis recurvatis glaucis maculis 
atro-virentibus notatis, margine albido cartilagineo-dentatis apice acutis nec epee, 5 
всаро basi foliis paucis instrueto ; floribus in spicam simplicem dispositis b llatis; 
tubo corolle superne vix ampliato, laciniis рее rotato-patentibus, ae Pass o on 
i 
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АР Е z P 2 “За ane E Ch ! 
