214 UNITED STATES AND MEXICAN BOUNDARY. 



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"high. Leaves 12-15 inches long and 1-1^ 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, 



about 



atro-virentibus notatis, margine albido cartilagineo-dentatis apice acutis nee spinescentibus ; 

 scapo basi foliis paucis instruclo ; floribus in spicam simplicem dispositis brevissime pedicellatis ; 

 tube corollie supcrne vix ampliato, laciniis lineari-oblongis rotato-patentibus. — Eagle Pass on 



r 



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 Kuntli 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, ^. 1 ? var. Sonor^ : foliis angusto-lineari- ; 



mi 



bus elongatis crebris superne concavis, subtus rotundatis, apice terretibus convolutis in spinam 



terminalem excurrentibus, margine filamentosis ; spica longissima, floribus per paria approxi- 



matis ; perigoniis (uncialibus) tubuloso-infundibuliformibus. — Sierra del Pajarito, Sonora, 

 August ; ScTiott. 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 or serratures. Scape (including 



its spike) 5-6 feet high. The flowers in pairs on 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 seraiuncialibus) subcampanulatis, laciniis breviovatis ; 

 capsulis subglobosis. — On various sierras of Pimeria Alta, Sonora ; Schott, Leaves all in a 

 radical cluster, 2^-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-Di/ch^ a species of which the flowers and fruit are not described. 



Agave Virginica, Linn.; Mlchx. Fl. 1, jp. 187 ; Kunth, Enum. 5, p. 833. Hills on the Eio 

 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 found at Eagle Pass on the 

 Rio Grande, (probably collected by Mr. Schott,) of which there are no specimens in the col- 

 lections : 



Agave maculata (Engelm,): radice crassa cylindrica nigra ; foliis radicalibas lanceolato- 

 linearibus longe acuminatis subtus convexis supra profunde concavis recurvatis glaucis maculis 



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