Search on : Taxa descriptions

 


   
Literature:
 
Page number:424 
Description type:Non-original description 
Description:Ramaria rielii Bond., Bull. Soc. MycoL France 13:13.1897.
Typus: PC, Herb. Boudier. Grande-Chartreuse (lsère), in fagetis et abiegnis mixtis. Septembre 1896, legit doct. Riel.(!).
Macroscopy:
Basidiome fasciculate, 12 x 5 cm., scarcely ramified with thick and densely packed branches forming an obovoid compact mass.
Base white to cream, 2.5 x 3 cm. (Boudier 1897a), glabrous, strong and subbulbous. Whitish to ochre (about 701OY) when dry.
Branch ramification (axils) acute, into 1-2(3) ranks, polychotomous. Primary branches common, 1-1.5 cm thick (Boudier 1897a), cylindrical to claviform, almost single, somewhat fused below. Branches sometimes flattened (Boudier 1896). Outer surface longitudinally grooved, somewhat winding, 0.5-1.3 mm wide and locally labyrinthiform when fused together. Grooves of orange salmon color and disappearing toward the base. Orangebrown color (77.m.yBr) when dried. Internodes up to 3 cm length.
Hymenophore amphigenous, with spore accumulation into grooves and points of branching. Spores yellowish orange (71.m.OY, 72.d.OY) in mass.
Apex obtuse, blunted, strong (up to 1.5 cm wide), not ramified nor well defined; with a labyrinthiform design because of the confluence of surface grooves there; of the same color as branches or lemon yellow when eroded.
Flesh white, yellow near hymenium; taste mild, not bitter (teste Boudier). Inner flesh spongy when dried, softer towards the base.
Microscopy:
Monomitic, tramal hyphae without clamps, 3.5-6(13) µm wide, somewhat wider at the base, (5.7)9.5-13(15.3) µm, strangulated at the septa. Wall up to 0.5 µm wide, hyaline. Ampulliform septa up to 16 µm wide, clearly ornamentated with short tips. Hyphae parallel to subparallel on the border and interwoven inwards, not congested. Secretory hyphae not seen.Subhymenial hyphae about 2 µm wide, hyaline, with a thin wall, not clamped and interwoven.
Basidia 70-80 x 10 µm (teste Boudier), claviform, unclamped, hyaline but commonly guttulate, sterigmata 4, about 6 µm long. They are in bad condition and break or collapse easily.
Spores yellowish, subcylindrical, sometimes sigmoid, (15)16.6-18.8(22,3) x (4)4.75.8(7) µm, Lm=17.69, Wm=5.25, E=(2.54)3.10-3.73 (5.58), Em=3.41 (16-18 x 5-7 according to Boudier), cyanophilous.
Spore wall up to 0.4 µm thick. Ornamentation conspicuous all over the surface, warty without particular orientation or somewhat longitudinally arranged but not grooved (see fig.l). Homogeneous or with a yellow, refringent guttule inside, rarely multiguttulate. Apiculus prominent, up to 1.5 µm length.
Ecology: On mixed woods with fir (AbieslPicea) and beech (Fagus sylvatica). Observations: Boudier (1897a,b) pointed out the presence of cystidia on the hymenium. No cystidia on the type have been located by us.
Conclusions
In view of the characters described, the studied exsiccata can not be R. botrytis nor R. strasseri because both species have spores with oblique striae, clamped hyphae and welldefined apices which are clearly ramified. On the other side, R. rielii has verrucose spores, unclamped hyphae and a non-ramified apex (see table 1); moreover, Lm value is up to 4 µm higher.

Clamps Spore Lm Em Definite apex
R. botrytis Yes striae 13.90 2.91 Yes
R. rielii No warts 17.69 3.41 No
R. strasseri Yes striae 13.70 2.59 Yes
Table 1.

Thus, R. rielii belongs to subgenus Laeticolora. There are scarcely any species without clamps and with a grooved hymenium known in this subgenus. Even if its original colors when fresh are those offered by Boudier (1896, 1897b) or they are the result of a rufescent reaction (which might explain the yellow shades on the subhymenium), this species can be related with R. claviramulata Matt & D.E.Stuntz or with R. sardiniensis Schild & Ricci. A comparative table is the following:

Lm Spore ornamentation Hymenium Apex
R.claviramulata 10.42 warts forming Subrugose Blunted, some ramified
pseudostriae or single
R.rielii 17.69 single warts Longitudinally Blunted grooved
R.sardiniensis 9.23 warts forming Subrugose to slightly Blunted and grooved
pseudostriae or single fused or scarcely separate

Table 2.

R. sardiniensis is a recently described species (Schild 1998) which differs by its Lm value and by the higher ramification rank. Also by its branch thickness, which is from 2.3 to 6 mm at the base in R. sardiniensis and from 10 to 15 mm at the branch apices in R. rielii. It shows a color change towards blackish on the base, which is not referred to by Boudier.
R. claviramulata is also somewhat close to R. rielii but Lm value is up to 7 µm longer in the latter and spore ornamentation is different too (see table 2).
 
Taxon name: