Pl. Rar. Sic. 2: 17 (1846); Gen. Gram.: 98 (1986).- Type-species: Castellia tuberculate Tineo = C. tuberculosa (Moris) Bor.
Description:
* Loosely tufted erect annual. Leaves linear, flat, auriculate.
* Inflorescence in racemes, sparsely branched at the base, simple above, scattered along a central axis; spikelets distichous, subsessile, appressed to the axis.
* Spikelets several-flowered, laterally compressed, disarticulating between the florets. Glumes unequal, narrow, coriaceous, shorter than the lemma. Lemma membranous, densely tuberculate, rounded, 5-nerved, subacute. Hilum linear.
Genus with one presumably widespread species.