Cryptangieae, Benth.

Costa, Suzana M., Vitta, Fabio A., Thomas, William W., Muasya, A. Muthama, Morokawa, Rosemeri, Bittrich, Volker, Shepherd, George J. & Do Amaral, Maria Do Carmo E., 2021, An updated generic circumscription for Cryptangieae (Cyperaceae, Poales) based on a molecular phylogeny and a morphological character reconstruction, Phytotaxa 483 (3), pp. 211-228 : 223

Identification key to the genera of Cryptangieae .

1. Spike-like inflorescence; glumes 2-ranked; fruit biconvex; hypogynous scales absent ............................... Exochogyne C.B.Clarke

1’. Panicle-like or head-like inflorescence; glumes spirally or sub-distichally arranged; fruit trigonous; hypogynous scales inconspicuous or conspicuous ............................................................................................................................................................2

2. Caudex well developed; inflorescence lateral; hypogynous scales with fimbriate margins .............................. Cephalocarpus Nees

2’. Caudex absent or inconspicuous; inflorescence terminal; hypogynous scales glabrous, with sparse ciliate to ciliate margins or pubescent at margin and dorsal surface..............................................................................................................................................3

3. Male spikelets with (1)4–5 stamens; fruit sessile, obscurely trigonous (trisulcate or inconspicuously ridged) .................................. .............................................................................................................................................................................. Lagenocarpus Nees

3’. Male spikelets with 2(3) stamens; fruit stipitate, trigonous with sharp ridges...................................................................................4

4. Dioecious herbs; involucral bracts (sterile or fertile) solitary or forming pseudo-whorls and with elliptic to oblong-elliptic blades ............................................................................................................................................................................ Didymiandrum Gilly

4’. Monoecious herbs; involucral bracts (sterile or fertile) never forming pseudo-whorls and with linear-lanceolate to filiform blades ............................................................................................................................................................................................................5

5. Leaf blade well developed, rarely reduced to sheath; inflorescence with conspicuously whorled paracladia; female spikelets with 1(2) flowers and 3 glumes; fruit with three conspicuous cavities at the base ...................................... Cryptangium Schrad. ex Nees

5’. Leaf blade always reduced to sheath; inflorescence branched or nearly unbranched but not with whorled paracladia; female spikelets with 1–5 flowers and 3–7 glumes; fruit cavities absent or inconspicuous ........................................... Krenakia S.M.Costa