Observation 280693: Physarum Pers.

Notes:
The sporocarps have a lime-covered white stipe with longitudinal thickening at the base (resembling the trunk of an old olive tre) and a distinct constriction at the apex; sporocarp 0.5 × 0.7mm, subglobular or more often compressed longitudinally, peridium with amorphous lime scales, spore mass chocolate brown, columella absent (?), capillitium reticulate and anastomosing with few rounded-elongate lime nodes, spores subglobular to globular, medium brown under light microscope, 8.3-10um (mean 9.2um) spinulose, arranged mostly uniformly (no aggregations).

Images

IMG_5963s.jpg
Spores (x1000 magnification), 8-10um (mean 9um)
IMG_5961s.jpg
Capillitium and lime bodies, rather elongate-fusiform
IMG_5951s.jpg
Reticulate capillitium, anastomosing, very thin and hairline (0.5um) with no or slight thickening at the nodes. Lime nodes not abundant but more frequent near the peridium
IMG_5949s.jpg
Capillitium
IMG_5907s.jpg
Sporocarps, LxW: 0.45–0.63 × 0.63–0.83 mm [Mean: 0.5 × 0.7 mm], oblate, Total length (stipe+sporocarp s.s.) 0.9-1.2um,
IMG_5881s.jpg
Columella absent ?
IMG_5874s.jpg
Note the stipe, consrticted at the apex, radicating at the base
IMG_5872s.jpg
Sporocarps under stereomicroscope
IMG_0913s.jpg
Specimen in habitus on fallen leaves (and fruit) of carob tree

Proposed Names

44% (2)
Recognized by sight
Used references: Poulain, Meyer, Bozonnet: Les Myxomycetes
Based on microscopic features: Spores, capillitum, lime nodes
Based on chemical features: Lactic acid produced air bubbles concluding in a calcareous deposit on stipe and sporocarp

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= Observer’s choice
= Current consensus

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Created: 2017-07-03 17:09:59 -03 (-0300)
Last modified: 2019-03-02 02:15:42 -03 (-0300)
Viewed: 23 times, last viewed: 2019-08-20 10:07:34 -03 (-0300)
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