|from Stevenson (in press) fig. 6
|The Cycad Pages
- Zamia melanorrhachis D.W. Stev., "Fl. Colombia 21: 55, fig. 11" (2001).
- "TYPE: Colombia, Cordoba, D. Stevenson et al. 695 (holo COL; iso HUA, NY, U)."[83 CLM]
The specific epithet is derived from the dark brown to almost dark purple rachis of the leaves of living plants.
Distribution and habitat:
Ranging from north-central Colombia to Amazonian Colombia. It grows in wet to semidry lowland forest.
Zamia melanorhachis is known from only three widely spaced localities. Its paucity in collections may well represent the fact that it is found in poorly explored areas. This is supported somewhat by the fact that it grows well and regenerates in an near native gardens.
Not listed in the
1997 IUCN Red List of Threatened Plants.
subterranean and tuberous, 5-8 cm diam.
triangular basally, linear-lanceolate apically, 2-5 cm long, 1-2 cm wide.
Leaves 2-5, erect, oblong, 50 cm long; petiole terete, to 25 cm long, dark purple to black when fresh, armed with very small prickles; rachis terete, usually armed with very small prickles in lower one-half, to 20-30 cm long, 4-10 pairs of leaflets.
papyraceous, lanceolate, acute at apex, cuneate at base, margins serrate in upper two-thirds, 12-15 cm long, 1-2 cm wide.
cream to tan, ovoid, 1-3 cm long, 0.5-1 cm diam.; peduncle 30-50 cm long; microsporophylls with both abaxial and a few (1-3) adaxial sporangia.
wine-red to dark red-brown, cylindrical to ovoid- cylindrical, 5-8 cm long, 3-4 cm diam.
red, 1-1.5 cm long, 0.5-0.8 cm diam.