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Subacaulis; foliis lineari-lanceolatis supra basin latiorem contractus apice indurato seu molli; panicula pyramidata in scapo foliaceo-bracteato alte supra folia elata; stigmatibus elongatis nunc distinctis albidis; capsula cuspidata, seminibus angustius marginatis. Forma genuina: sæpius breviter caulescens; foliis rigidioribus rectis mucrone nunc obtusato brevi apicatis dorso scabridis, filis marginalibus crebris plerumque circinatis; panicula ramis fere horizontalibus pyramidata densiflora scapo bracteis minoribus spatulatis instructo æquilonga seu longiore lævi; staminibus sæpe pistillo æquilongis; stigmatibus gracilibuis demum divergentibus seu recurvatis; capsula minore plerumque medio constricta, dissepimentis secundariis fere semper rudimentariis; seminibus minoribus.

P. * The species of the third section, Paniculatæ, are distinguished by a branching inflorescence, a panicle, in which more or less crowded bunches of flowers are borne on the end of secondary or tertiary branches. I have not been able to examine fresh inflorescences or their development, but, judging from dried fragments, the flowers seem originally to appear in pairs, usually with secondary and tertiary flowers unsymmetrically developed from their pedicels, and at last clustered, sometimes 20 or 30 or more together, so that their relative position can not be unravelled.

The short peduncle or scape of the inflorescence is 1–2 inches in diameter, the panicle 2–4 feet long, much branched and dense flowered, glabrous or sometimes upwards pubescent, bearing large conspicuous bracts 4 or 5 inches long, 1–3 wide concave, fleshy or leathery, greenish outside, whitish inside, with a sharp herbaceous or brown point; the ultimate small bracts are similar, mostly ovate-lanceolate; in Mexican specimens from Parras they are thinner, oblong, obtuse, and pure white. ENGELMANN—NOT ES ON T H E GENUS YUCCA.