"Plants moderately mucilaginous, delicate; branching irregular and abundant; apices straight, apical cells embedded within the fascicles; 3.0-11.0 cm high, 500-1,200 µm in diameter. Whorls well developed, usually distinct and separated, obconical or barrel-shaped, compressed and indistinct in older parts. Internode 250-550 µm long. Pericentral cells ovoid with 2-3 primary fascicles; rhizoidal filaments well developed, forming 1-2 layers of cylindrical cells. Primary fascicles curved or with distal ends curved, 13-20 cell-storeys, proximal cells cylindrical or elliptical, L/D 3.0-5.0; distal cells elliptical, L/D 1.5-3.5; branching unilateral or dichotomous. Secondary fascicles abundant, curved or with distal ends curved, covering the entire internode and as long as primary fascicles.
Monoecious. Spermatangia obovoid or spherical, terminal or sub-terminal on primary or secondary fascicles, 5.5-7.0 µm in diameter. Carpogonial branches helically twisted, arising from pericentral cells, composed of 8-10 disc- or barrel-shaped cells; involucral filaments short, 2-5 cell-storeys; carpogonia 30-40 µm long; trichogynes cylindrical or club-shaped, unstalked, 7.0-9.0 µm in diameter. Carposporophytes1 per whorl, loose, semi-spherical, higher than the whorl radius, 500-900 µm in diameter, 200-500 µm high; gonimoblast filaments 8-12 cell-storeys; cells cylindrical or elliptical; carposporangia obovoid or sub-spherical, 10.0-15.0 µm long, 8.5-12.0 µm in diameter."
Necchi, O. Jr. & Vis, M.L. 2012. Monograph of the genus Kumanoa (Rhodophyta, Batrachospermales). Bibliotheca Phycologica 116. J. Cramer. Pp. 78. ISBN 978-3-443-60043-3.
