Bornetella nitida

Thallus solitary, or in groups, unbranched subcylindrical, clavate, slightly curved, bright green, brownish-red or brownish-red-green, shining, lightly calcified, (0.7)-1.9-3(-5) cm high, 3.5-4 mm diam. above, narrowing to the base 2-2.5 mm. Inner structure: central axis (400-650 mm diam.) bear 24-30 primary branches with 4-6(-7) short capitate secondary branches joined together and forming a monostromatic cortex of hexagonal (in surface view) cells, 180-210 mm across. Aplanosporangia (1-2) borne laterally on primary branches; shortly stalked, spherical (130)-180-220 mm diam., containing 8-24(-26) oval aplanospores. Attachment by small rhizoid-like holdfast to rocks, dead coral blocks, in intertidal, upper subtidal (to 3 m deep) exposed to moderate wave action.

Subtropical and tropical waters of Indian and Pacific Ocean.