glabrous, secondary veins 3 - 4, flat above and below but distinct, glabrous, tertiary veins flat, 
glabrous, domatia absent; inflorescence 2.5 - 4.5 cm long, axillary to leaves, cymose, just one or 
two branchings, pauciflorous, peduncle 1.5 - 3 cm long, glabrous, rachis glabrous, flower pedicel 
(8) 9.5 - 12.5 mm long, glabrous; flower urceolate or slightly campanulate, greenish (?), tepals 
2.2 - 2.4 mm long, 1.6 - 2 mm wide, widely ovate, glabrous outside, sericeous inside, red hairs 
present, stamens of whorls I & II ca. 1.1 mm long, filament as wide as anther, sericeous ad and 
abaxially, red hairs present, anthers 0.6 mm long, quadrangular, glabrous, sporangia four, 
stamens of whorl III ca. 1.3 mm long, filament wider than anthers, sericeous on margins, 
sometimes red sericeous abaxially, anthers ca. 0.6 mm long, glabrous, sporangia four, glands 
absent, staminode ().7 - 0.8 mm long, filament sparsely sericeous on margins, sometimes also 
abaxially, head ca. 0.5 mm long, slightly trullate or ovate in outline, not much wider than 
filament, glabrous, hypanthium ca. 0.5 mm deep, glabrous outside and inside, or with some red 
hairs coming down from III whorl stamens and staminodes bases, pistil 1.8 - 1.9 mm long, 
glabrous, ovary ca. | mm long and wide; fruit (maybe not ripe) 8 - 8.5 mm long, 6 - 6.5 mm 
wide, ellipsoid, cupule 4 - 5 mm long, 3.5 mm wide, pedicel 1.5 - 4.5 mm long, 0.6 - 0.7 mm 
wide, tepals persistent. 
Flowers and fruits present in April. Vegetation type: elfin forest (cloud forest) at 1770 m 
of altitude. So far C. concinnum is known only from the type locality, a low mountain in the 
Isthmus of Tehuantepec, Oaxaca. 
Placement of this species in Cinnamomum is provisional. The characters that distinguish 
it from the rest of species in the area are really singular in the group (even for the Lauraceae as a 
71 
