Gracilaria flabelliformis (P.Crouan & H.Crouan) Fredericq & Gurgel

Resendiz, María Luisa Núñez, Dreckmann, Kurt M., Sentíes, Abel, Wynne, Michael J. & Tejera, Hilda León, 2019, Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico, Phytotaxa 387 (3), pp. 219-240 : 232

Gracilaria flabelliformis (P.Crouan & H.Crouan) Fredericq & Gurgel

Thallus fleshy, reddish-brown, greenish or pinkish, 2–18 cm long, with flattened axes in cross section, 250–310 μm x 900–1070 μm in diameter. Main axes and branches branching dichotomous, pseudodichotomous, trichotomous or irregularly, with smooth surfaces, rounded or blunt apices ( Fig. 42 ). Pseudoparenchymatous organization, with an abrupt transition between medulla and cortex ( Fig. 43 ). Medulla with four layers of rounded cells, 30–90 μm x 90–270 μm in diameter. Subcortex with one or two layers of spherical cells, 18–24 μm in diameter. Cortex with a layer of spherical cells, deeply pigmented, 10–15 μm in diameter.

Figures

FIGURES 39–50. 39–41. Gracilaria cornea. 39. Habit. Scale bar = 4 cm. 40. Medullary and cortical cells. Scale bar = 250 μm. 41. Tetrasporangia in cortex. Scale bar = 30 μm. 42–43. Gracilaria flabelliformis. 42. Habit. Scale bar = 1.5 cm. 43. Medullary and cortical cells. Scale bar = 260 μm. 44–45. Gracilaria mammillaris. 44. Habit. Scale bar = 2 cm. 45. Medullary and cortical cells, and a mature cystocarp. Scale bar = 200 μm. 46–48. Gracilaria microcarpa. 46. Habit. Scale bar = 3 cm. 47. Medullary and cortical cells. Scale bar = 130 μm. 48. Mature cystocarp. Scale bar = 60 μm. 49–50. Gracilaria tikvahiae. 49. Habit. Scale bar = 2 cm. 50. Medullary and cortical cells. Scale bar = 130 μm.