Echinomastus unguispinus var. laui
Cact. Succ. J. (Los Angeles) 51: 125. 1979
Family
Cactaceae
Genus
Species
Echinomastus unguispinus var. laui
Author
(G.Frank & Zecher) Glass & R.A.Foster
Chinese genus
美刺球属
Chinese name
-
Accepted
DescriptionEdit description
Habit
Plants solitary with spines almost hiding the body.
Central Spines
3-9 (usually 4), stronger than in typical Echinomastus unguispinusSN|14901]]SN|14901]], acicular, white, pale yellow to brownish but with brown to black tips, the upper side is always darker than the bottom side, straight to curved, up to 35 mm long, directed upwards, lower one robust, noticeably down-curved from near the base pointing outward and downward.
Flowers
Hardly gettig through the dense apical spines, funnelform, dirty yellowish-green but darkening as they ripen getting from green to reddish-brown, remaining erect up to 2.5 cm in diameter.
Ribs
13-21(-25) strongly tuberculate.
Stem
Globular with a slightly flattened apex to short cylindrical 7-14 cm tall, 7-15 cm in diameter, gray-green or bluish green.
Radial Spines
15-30 white to yellowish to blue-gray with black apex, becoming gray with age, 15-33 mm long irregularly spreading, some interlacing.
Areoles
Slightly elongated without (or with very reduced) nectar glands.