sometimes to small bracts, racemiform, few times basal dichasia present, pauciflorus, filiform 
bracts often present at main branching points, peduncle (2) 3 - 6 (7) cm long, glabrous, rachis 
glabrous, flower pedicel (10) 12 - 20 (24.5) mm long, glabrous; flower narrow campanulate or 
urceolate, tepals 2.5 - 3.2 mm long, 2 - 2.2 mm wide, ovate to widely ovate, glabrous outside, 
sericeous inside, stamens of whorls I & II 2 - 2.3 mm long, filaments sparsely sericeous at base 
ad and abaxially, elsewhere glabrous, anthers ca. 1.2 mm long, glabrous, sporangia four, stamens 
of whorl III 2 - 2.3 mm long, sparsely sericeous at base ad and abaxially, elsewhere glabrous, 
anthers ca. | mm long, glabrous, sporangia four, glands 0.7 mm long, at base of filament, 
sericeous adaxially, staminode 1.1 - 1.3 mm long, filament sericeous ad and abaxially, red hairs 
present, head 0.7 - 0.8 mm long, triangular to cordate in outline, glabrous, except for central 
lower half sparsely sericeous abaxially, hypanthium 0.5 - 0.7 mm deep, glabrous outside, 
sericeous inside, red hairs present, pistil 2.7 - 3 mm long, ovary 1.2 - 1.3 mm long, 1.1 - 1.3 mm 
wide; no mature fruits known, tepals apparently persistent. 
Flowers in May; young fruits in July. In pine-oak mixed forest, at 1850 m altitude. So far 
only known from a small area in the western Sierra Madre, Mexico. 
C. longipes is quite a distinctive species. The combination of very long pedicels, long 
petioles, ridged twigs, leaves mostly without domatia, and the singular character of racemiform 
inflorescence, is not found in any other species of this genus in America. 
Specimens examined. MEXICO. Hidalgo. Cerca de Tehuitzila, 5 km SE de Zacualtipan, 
Rzedowski 12548 (ENCB)); Barranca below Honey Station, C.G. Pringle 8829 (GH, F(2 sheets), 
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