Xerophyte

Central Spines

One, hooked, erect or descending, rarely hooked, thickened at the base on older plants only, 5-20 mm long, horn coloured to brown, soon greyish-white.

Seeds

Kidney-shaped, 1.2 x 0.8 mm, light brown, surface net-like.

Description

Coryphantha vogtherrianaSN|10210]]SN|10425]] is a solitary globose cactus specie occasionally forming low clumps. The stems usually grows deeply embedded in the soil. The presence of the red nectary glands and the mucilaginous cortex, distinguish it from the closely related, glandless Coryphantha maiz-tablasensisSN|735]]SN|10267]]. Moereover C. vogtherriana has a central spine and more edged, flattened tubercles (C. maiz-tablasensis has rounder tubercles and no central spines).

Tubercles

Loosely arranged, conical to ovoid, somewhat edged, and flattened to 17 mm long, axils densely woolly, with glands. Concerning the tubercle groove, this species shows a particular phenomenon which is known in Ortegocactus and, within the genus Coryphantha, only for Coryphantha ottonisSN|10267]]SN|735]] and Coryphantha georgiiSN|10425]]SN|10210]]

Flowers

Pale yellow, to 3-4 cm in diameter, 3.5 cm long, with much wool at the flower-base. Perianth segments 24-34 broad lanceolate, up to 3 cm long, 2.5-4 mm wide, margins entire. Outer perianth-segments with a strong, dark red midstripe. Inner perianth segments white, at times yellowish-white, sometimes with a faint pink-coloured midstripe and often with reddish tips. Stigma lobes 5-8, light yellow, anthers dark yellow, ovary small and oval.

Radial Spines

4-6 (or more), needle-like, in youth whitish, horn-coloured or brown, later greyish-white, often with darker brown tips, spreading horizontally, slightly curved to the side, somewhat curved to the body, upper ones somewhat closer to each other,(5-)7-13(-15) mm long.

Fruits

Small (8 mm long, 5 mm diameter), green juicy, with much white wool at the base and attached flower remnants.