Marine red algae of Pacific Mexico. pt. 1. Bangiales to Corallinaceae Subf. Corallinoideae, Gelidium ? sonorense sp. nov., p. 75 |
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NO. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 75
complanate, giving rise to about 3 orders of irregularly alternate or sub-
opposite, distichous lateral branchlets, the first 1-2 orders of long, indeterminate branches, but the ultimate and subultimate orders relatively
short and often more or less uniform in length, giving a non-congested
aspect; successive branch-orders reduced slightly in diameter; ultimate
branchlets not markedly geniculate; transection showing a medulla of
rather irregular sized cells up to 18 p in diameter, the rhizoidal filaments strictly longitudinal, in a dense subcortical zone with only a few
scattered in the medulla; cystocarps (not seen in Mexican material)
usually solitary in the center of a short, acute branchlet, these not
branched or much prolonged above and usually not producing additional
fertile branchlets below; tetrasporangia in terminal sori in short, blunt,
usually simple or lobed ultimate ramuli; antheridia (not seen in Mexican material) in longer ramuli which are quite variable in diameter in
different parts.
Type: Holotype is Gardner 2569 on sheet 295841 in the Herbarium of the University of California, Berkeley.
Type locality: Laguna Beach, Orange County, California.
Mexican distribution : Pacific Baja Calif.—D. 263, 8 km. south
of Punta Descanso, Jan. (tetrasporic); D. 1239 (Apr.), 8648 (Dec),
Socorro (tetrasporic) ; D. 8820, Punta Baja, Jan. (tetrasporic); D.
8700, shore at Canada Quemado, Jan. (tetrasporic).
This species seems distinct from Gelidium purpurascens on the one
hand by its more slender proportions and by its solitary cystocarps, and
from G. papenfussii on the other by its usually shorter, more uniform
ultimate and subultimate branches and short, usually simple (or lobed)
tetrasporangial branchlets.
Gelidium ? sonorense sp. nov.
Plate 5, fig. 5; Plate 21, fig. 2
Thallis 4-6 cm. altis, in fascibus laxis; partibus erectis planis, anguste
ligulatis, 180-230 p crassis, 900-1100 p latis, aperte pinnateque ramosis
intervallis valde irregularibus; ramis 2-3 ordinum, in omnibus ordinibus
fere eiusdem latitudinis; filamentis rhizoideis abundantibus per medullam
subcorticemque; tetrasporangiis in soris anguste elongatis in ramis ordinum superiorum, ope marginum prominentium, sterilium limbatis.
Thalli saxicolous, loosely clumping, 4-6 cm. high, consisting of several
semi-erect or spreading stipitate fronds arising from a few short, creeping, stoloniferous branches attached by several small discs or pegs; erect
Object Description
Description
| Title | Marine red algae of Pacific Mexico. pt. 1. Bangiales to Corallinaceae Subf. Corallinoideae, Gelidium ? sonorense sp. nov., p. 75 |
| Type | texts |
| Format (imt) | image/tiff |
| Contributing entity | University of Southern California |
| Filename | AHF-PUB-PE-17-01~079.tiff |
| Full text | NO. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 75 complanate, giving rise to about 3 orders of irregularly alternate or sub- opposite, distichous lateral branchlets, the first 1-2 orders of long, indeterminate branches, but the ultimate and subultimate orders relatively short and often more or less uniform in length, giving a non-congested aspect; successive branch-orders reduced slightly in diameter; ultimate branchlets not markedly geniculate; transection showing a medulla of rather irregular sized cells up to 18 p in diameter, the rhizoidal filaments strictly longitudinal, in a dense subcortical zone with only a few scattered in the medulla; cystocarps (not seen in Mexican material) usually solitary in the center of a short, acute branchlet, these not branched or much prolonged above and usually not producing additional fertile branchlets below; tetrasporangia in terminal sori in short, blunt, usually simple or lobed ultimate ramuli; antheridia (not seen in Mexican material) in longer ramuli which are quite variable in diameter in different parts. Type: Holotype is Gardner 2569 on sheet 295841 in the Herbarium of the University of California, Berkeley. Type locality: Laguna Beach, Orange County, California. Mexican distribution : Pacific Baja Calif.—D. 263, 8 km. south of Punta Descanso, Jan. (tetrasporic); D. 1239 (Apr.), 8648 (Dec), Socorro (tetrasporic) ; D. 8820, Punta Baja, Jan. (tetrasporic); D. 8700, shore at Canada Quemado, Jan. (tetrasporic). This species seems distinct from Gelidium purpurascens on the one hand by its more slender proportions and by its solitary cystocarps, and from G. papenfussii on the other by its usually shorter, more uniform ultimate and subultimate branches and short, usually simple (or lobed) tetrasporangial branchlets. Gelidium ? sonorense sp. nov. Plate 5, fig. 5; Plate 21, fig. 2 Thallis 4-6 cm. altis, in fascibus laxis; partibus erectis planis, anguste ligulatis, 180-230 p crassis, 900-1100 p latis, aperte pinnateque ramosis intervallis valde irregularibus; ramis 2-3 ordinum, in omnibus ordinibus fere eiusdem latitudinis; filamentis rhizoideis abundantibus per medullam subcorticemque; tetrasporangiis in soris anguste elongatis in ramis ordinum superiorum, ope marginum prominentium, sterilium limbatis. Thalli saxicolous, loosely clumping, 4-6 cm. high, consisting of several semi-erect or spreading stipitate fronds arising from a few short, creeping, stoloniferous branches attached by several small discs or pegs; erect |
| Archival file | hancockunpub_Volume21/AHF-PUB-PE-17-01~079.tiff |
