Origin and Habitat: Mexico (Plateau near El Paso) Texas.

• Agave lophantha var. poselgeri (Salm-Dyck) A.Berger
• Agave poselgeri Salm-Dyck

• Agave univittata Haw.
• Agave heteracantha var. univittata (Haw.) A.Terracc.
• Agave lophantha var. univittata (Haw.) Trel.
• Agave lophantha var. pallida A.Berger
• Agave lophantha var. poselgeri (Salm-Dyck) A.Berger
• Agave poselgeri Salm-Dyck
• Agave univittata var. angustifolia (A.Berger) H.Jacobsen
• Agave lophantha var. angustifolia A.Berger
• Agave univittata var. brevifolia (Jacobi) H.Jacobsen
• Agave lophantha var. brevifolia Jacobi
• Agave univittata var. coerulescens (Salm-Dyck) H.Jacobsen
• Agave caerulescens Salm-Dyck ex Jacobi
• Agave coerulescens Salm-Dyck
• Agave coerulescens Salm-Dyck ex Jacobi
• Agave lophantha var. caerulescens (Salm-Dyck) Jacobi
• Agave lophantha f. caerulescens (Salm-Dyck ex Jacobi) Voss
• Agave univittata var. gracilior (Jacobi) H.Jacobsen
• Agave lophantha var. gracilior Jacobi
• Agave univittata var. heteracantha (Zucc.) Breitung
• Agave heteracantha Zucc.
• Agave univittata var. lophantha (Schiede ex Kunth) Maire & Weiller
• Agave lophantha Schiede ex Kunth
• Agave univittata var. subcanescens (Jacobi) H.Jacobsen
• Agave lophantha var. subcanescens Jacobi
• Agave vittata Regel
• Agave heteracantha var. vittata (Regel) Regel

• Agave univittata var. lophantha f. quadricolor
• Agave cv. Goshiki Bandai
• Agave kerchovei pectinata
• Agave lophantha f. quadricolor hort.
• Agave lophantha cv. Goshikibandai

Description: Agave lophanthaSN|25300]]SN|25300]] poselgeri is a small growing species not more than 30-40 cm tall and 50-60 cm in diameter (but often less) and recognizable for the open, loose, rather than erect rosettes typical of the related Agave lechugulla and Agave lophanthaSN|25300]]SN|25300]]. It has a free suckering habit and occurs in a variety of forms, some specimen produces only a few large rosettes while some very prolific ones grows into dense cushion with dozen or even hundreds of small, crowded, offsets. Younger specimen are easily misidentified with Agave funkiana which has pale-brown spination, always reddish in Agave lophanthaSN|25300]]SN|25300]] poselgeri.
Rosettes. Stemless.
Leaves: Only 20-26 cm long, 16-18 mm wide, linear, lanceolate, flattish, ondulated, snake-like, often falcately spreading, convex below concave above, glaucous green with a lighter band in the middle portion of the upper face and with characteristic dark broken strips on the underside. The margins are marked by a thin continuous reddish border armed with remotely spaced, down-slanted small, teeth of the same colour which are weak and friable, absent in the upper part. Terminal spine long, fine conical to subulate, very sharp, large.

Notes: This species belongs to the tribe Marginatae with Agave lophanthaSN|573]]SN|25300]], Agave lechuguillaSN|503]]SN|23013]], Agave victoriae-reginaeSN|1680]]SN|415]], Agave kerchoveiSN|293]]SN|293]], Agave horridaSN|415]]SN|1680]], Agave funkianaSN|23013]]SN|503]], Agave titanotaSN|25300]]SN|573]], etc.

Bibliography: Major references and further lectures
1) Hermann Jacobsen “Abromeitiella to Euphorbia” Blandford Press, 1960

Cultivation and Propagation: It is a relatively easy-to-grow species. Suited for light shade to full sun, but better with some shade in summer. it needs a very well-drained soil and grows fairly fast in summer if provided with copious water, but allow to dry thoroughly before watering again (the more water and fertilizer this plant gets, the faster it will grow). During the winter months, one should only water enough to keep the leaves from shriveling.
It has been reported to be frost tolerant down to -12° C, but it is best to avoid freezing temperatures if not perfectly dry.
It does great in containers or in the ground. Plants cultivated outdoors are more drought tolerant and can take some heat and full sun.
Propagation: It is usually propagated clonally from offsets, which often are found growing around the base of the plant. Remove the basal suckers in spring or summer and let the cuttings dry for a few days before inserting into compost.