Gracilaria blodgettii Harvey

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 blodgettii Harvey

Thallus elastic, cartilaginous, graceful, pinkish red, 12–16 cm long, with cylindrical axes in cross section, 510–730 μm in diameter. Main axes with scattered slight constrictions, branching irregularly and in some portions of the stem subalternately; branches markedly constricted at the base, with smooth surfaces ( Fig. 33 ). Pseudoparenchymatous organization, with an abrupt transition between medulla and cortex ( Fig. 34 ). Medulla with 7–8 layers of polygonal cells, 50–140 μm x 60-180 μm in diameter, with a markedly thickened cell wall. Subcortex with one layer of spherical cells, 10–15 μm in diameter. Cortex with one layer of rounded cells, 4–6 μm in diameter.

Figures

FIGURES 28–38. 28–29. Meristotheca cylindrica. 28. Medullary filaments and cortical cells. Scale bar = 140 μm.29. Immature cystocarp. Scale bar = 220 μm. 30–32. Tepoztequiella rhizoidea. 30. Habit. Scale bar = 3.5 cm. 31. Medullary filaments and cortical cells. Scale bar = 90 μm. 32. Tetrasporangia basally attached (arrowhead). Scale bar = 30 μm. 33–34. Gracilaria blodgettii. 33. Habit. Scale bar = 2 cm. 34. Medullary and cortical cells. Scale bar = 140 μm. 35–36. Gracilaria caudata. 35. Habit. Scale bar = 4 cm. 36. Medullary and cortical cells and a mature cystocarp. Scale bar = 310 μm. 37–38. Gracilaria cervicornis. 37. Habit. Scale bar = 3 cm. 38. Medullary and cortical cells. Scale bar = 150 μm.