Coryphantha laui
Cact. Succ. J. (Los Angeles) 51: 278 1979.
Family
Cactaceae
Genus
Species
Coryphantha laui
Author
L.Bremer
Chinese genus
顶花球属/菠萝球属
Chinese name
-
DescriptionEdit description
Central Spines
0-1, straight, stright or slightly curved downwards, thick, 14-16 mm long, reddish-brown to dark mahogany, becoming grey.
Seeds
1 x 1.2 mm, brownish, reniform, smooth, shiny, reticulate.
Description
Coryphantha pseudoechinusSN|10157]]SN|10393]] subsp. laui (Bremer) Dicht & A. Liithy is very similar to the standard Coryphantha echinusSN|10393]]SN|10157]], with the exception of yellow flowers and slightly different skin and spination colour.
Tubercles
Conical, somewhat flattened on the upper side, up to 13 mm long, with narrow groove on upper surface, sometimes with yellowish glands near the areoles. Axils woolly in youth.
Flowers
funnelform,Pale yellow, 3.5 cm long, 3 cm diameter. Outer perianth segments linear lanceolate, light yellow with green near the tip, and reddish-brown dorsal midstripe.Onner perianth segments linear lanceolate, light yellow. Flaments glassy white, anthers light orange. Style pale green with 5-7 cream-white stigma lobes.
Stem
Solitary or group-forming, globose to ovoid, apex slightly depressed, white woolly, 5.5 cm across and up to 5 cm tall, grass-green.
Radial Spines
18-20, needle-like, often bristly, flexible, 10-14 mm long, yellowish-horn-coloured.
Fruits
Egg-shaped, up to 18 mm long and 8 mm wide, jade-green, succulent, with attached flower remnants.
Areoles
Round, 2 mm diameter at fist woolly soon naked.