 Phylum：Oomycota >> Class： Oomycetes >> Order： Saprolegniales |
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 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Brevilegnia longicaulis | |||
| Author： |
Brevilegnia longicaulis Johnson. Mycologia, vol. 42, p. 243-244, fig. 1 1950. |
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| Description： |
Mycelium depauperate, forming a dense growth on hempseed; 20-50 μ in diameter at base; delicate and branching, sporangia abundant, terminal; clavate to long cylindrical; 98-600 μ long by 20-28 μ in diameter, averaging 150-350 × 22-25 μ; generally 2-4 spores wide, branching, sometimes producing spore in a single row in part, but not in the whole; secondary sporangia arising by sympodial branching. Encysted spores spherical, angular, 10-12.5 μ in diameter. Spore discharge thraustothecoid. Oogonia abundant; spherical 24-37.5 μ in diameter, predominantly 28-32.5 μ; rising singly on long slender, curved, lateral stalks; wall smooth; hyaline; unpitted. Oospore 1 in number, spherical and not filling the oogonium; eccentric; 21.5-30 μ in diameter, generally 22.5-28 μ. Antheridial branches diclinous, long irregular and branched, often wrapping about the oogonium, never observed androgynous; one to three antheridia to the oogonium. Gemmae lacking. | |||
| Specimens： |
Collected twice from soil samples. (Oct. 2, 1974. Yang-ming Shan;sweet potato field) |
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| Habitat： |
Soil and water | |||
| Distribution： |
New Caledonia |
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| References： |
Johnson TW Jr. 1950. |
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| Provided： |
T. S. Chiou and H. S. Chang |
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| Note： |
B. longicaulis has been isolated from soils twice. It is characterized with diclinous antheridium; monoclinous or other type of antheridium were not being accessed. | |||