Ceratozamia hildae G.P.Landry & M.C.Wilson

국표에 없다.

Origin and Habitat: Ceratozamia hildaeSN|31989]]SN|31989]] has a sporadic distribution in the bordering ranges of Querétaro and San Luis Potosí states, Mexico where it is found in the region of the Huasteca Potosina near the Santa Maria river. Number of mature individuals between 500 and 1000.
Altitude range: 850-1300 metres above sea level.
Habitat and Ecology: This species occurs in the cloud zone in deciduous oak (Quercus) woodlands. Plants grow in heavy black clay and among limestone rocks. Often it occurs with other cycads such as Zamia fischeri and Dioon eduleSN|11224]]SN|11224]]. Generation Length 45 years. Ceratozamia hildaeSN|31989]]SN|31989]] is one of many species of Mexican cycad commercially exploited and is a prime example of a plant seriously threatened by trade. It is estimated that thousands of plants were removed from habitat and that only small and scattered subpopulations remain. Ceratozamia hildaeSN|31989]]SN|31989]] is critically endangered and near to extinction in the wild, although abundant in cultivation.

Synonyms:

• Ceratozamia hildae G.P.Landry & M.C.Wilson

Common Names include:
ENGLISH: Bamboo Cycad
SPANISH (Español): pata de gallo

 

Description: The bamboo cycad (Ceratozamia hildaeSN|31989]]SN|31989]]) is an acaulescent fernlike perennial plant. It is unique among cycads, having as many as three or occasionally five or six (or more) fasciculate leaflets clustered at the nodes along the rachis (arising from a single point in a whorl and appearing as though they are divided) giving this cycad bamboo like appearance. Rarely do individual leaves with non-clustered leaflets occur except in young plants. Occasionally clustered leaflets occur also in Ceratozamia latifoliaSN|31989]]SN|30188]]. The leaves may be up to 1.5 meters in length. Additionally the leaflets are thin and papery rather than thick and leathery, like other Ceratozamias. Moreover some leaves may be devoid of prickles while others are densely prickly even on the same plant. The arrangement of the leaflets in clusters on the rachis is its most striking feature and separates this species within the genus.
Derivation of specific name: The specific name "hildae" honors Hilda Guerra Walker, daughter of the commercial Collector Luciano Guerra who first collected this plant in the 1950s. This species became widespread and abundant in cultivation before being described from cultivated plants. Ceratozamia hildaeSN|30188]]SN|31989]] was not formally named until 1979.
Stem: This species forms a short above ground stem, as do most Ceratozamias. The stem may eventually reach a height of 10-20(-30) cm and diameter of 5-25(-30) cm. These stems are covered with persistent, hard, armored leaf bases. Ceratozamia hildaeSN|31989]]SN|31989]] grows quickly, and often develops a branched underground stem for several years before develops a slender trunk to about 15 cm tall and 12 cm across. These lateral, underground stems will eventually surface. In very old specimens with several stems of similar size, it is often impossible to determine which was the original stem.
Leaves (fronds): 5-20 in crown. Young leaves emerging bronze, red or chocolate brown, or mid-green and hairy. Mature leaves 1-1.5 m long, light or bright green, semiglossy, smooth, glabrous, flat (not keeled) in section. Petiole 20-30 cm long, woolly at the base, armed with prickles. Leaflets 20-50 on each leaf, 7-22 cm long, 1-5 cm wide, lanceolate, asymmetric, broadest above middle, falcate, spreading to recurved, clustered at the nodes along the rachis in groups of 3 to 6 (occasionally up to12), thin-textured, somewhat papery, weakly discolorous, light green above, silvery beneath, venation straight, margins flat, apex acute. Rachis not or slightly spirally twisted. The first through third seedling leaves of C. hildae generally have from one to three pairs of opposite leaflets resembling other species of Ceratozarnia. It is not until the third leaf is produced that clustered leaflets appear along the rachis distinguishing the plants as C. hildae. Occasionally some specimens retain opposite leaflet arrangement.
Male cones: 18-25 cm long, 2-3 cm wide, fusiform-cylindrical, yellow-green to yellowish brown; sporophylls with two horns to 3 mm long. Peduncle to 3.5cm long, slightly woolly.
Female cones: (6-)10-14(-20) cm long, 3-5 cm wide, narrowly ovoid-cilindrical to cylindrical, yellow-green to olive green; sporophylls with two large horns, separated by a prominent oval ridge. Peduncle to 9 cm long. Individual pollinated cones yield as many as 40 seeds per cone.
Seeds: 18-20 mm long, 15 cm wide, ovoid, smooth. Sarcotesta white, ageing to brown.
Phenology: Both pollen and seed cones are produced singly from February to April. Pollination can occur from mid-April to early June. Seed cone maturation requires approximately nine

months. Each year, cones which have been pollinated in April and May disintegrate with ripened seeds in November and December. Female plants in which seed production has occurred generally produce new seed cones within a short period (2-3 months) following the disintegration of the previous cone.

 

Ceratozamia hildae (llifle.com)

https://youtu.be/vhI8LXK7A2Q?t=1677