Favoritos de cchapman-lam

@georgeg any thoughts welcome - I don't have any experience with this group and interested in opinions!

Asci 4-spored. Spores ellipsoid, ~23 um x 10um. Seems to key to the group Octospora gemmicola var. tetraspora, O. itzerottii, O. leucoloma var. tetraspora using this key:
http://www.octospora.de/pdf/key_main_groups.pdf

On 4 Balsam Fir and White Spruce trees in this area adjacent to/in swamp. Laminal and marginal soredia; soredia many per soralium; light/tan underside; rhizines extending close to margin; epruinose lobe tips; cortex K+ yellow, medulla C+ red. Currently appears to be the first record of the species for Nova Scotia.

M.J. Oldham 28854b; specimen record, replicates at MICH, NHIC# 12011; identified by D.R. Farrar Nov. 2019 from specimen scan as "B. crenulatum (28854a; spaced pinnae; https://inaturalist.ca/observations/101534582) and B. yaaxudakeit (28854b; this observation; broad pinnae overlapping rachis)" (previously identified by M.J. Oldham as Botrychium lunaria); rocky Precambrian summit and adjacent fen; GPS waypoint 91; new to Ontario

M.J. Oldham 37879b; specimen record; replicates at ISC, NHIC# 11977; identified as B. tunux by D.R. Farrar Nov. 2019 from specimen scan ("the smaller stocky ones with rounded pinnae") (mixed collection with B. lunaria, 37879a, https://inaturalist.ca/observations/101043359); open, flat low, vegetated beach ridge near Hudson Bay coast; local; new to Ontario

On the ground small bright orange cup fungi with short brown hairs. Apothecia sessile, 2-4mm in diameter.
Ascospores subglobose with isolated warts.
ITS- 96% Scutellinia umbrorum, hyperborea, barlae.

Site revisit; plants healthy but very small population. Note: petiole scales light brown with dark central stripe vs. D. campyloptera which lacks the central stripe and is documented well east in Quebec and beyond

First eastern Canadian record, I believe. A European species established in the west from northern California to southern BC. Only other eastern North American occurrences I could find online are from Ohio (state level record given in BONAP) and eastern Maine in 2018 by @michael_oldham and Tony Reznicek (iNaturalist). Well established here over about 10m in seasonally flooded, mowed, roadside ditch.

M.J. Oldham collection 43092, replicates to CAN, DAO, TRT, MICH, BABY, NHIC# 03379, LKHD, MT, +1; previously collected (#43039) here; population originally discovered by Sean Blaney; disturbed trail edge; see Oldham, M.J., W.D. Van Hemessen, and S. Blaney. 2018. Round-fruited St. John’s-wort (Hypericum sphaerocarpum, Hypericaceae) in Canada. Canadian Field-Naturalist 132(4): 389–393.

avec @m-bibittes

Specimen: Léveillé-Bourret & Garon-Labrecque 1520 (MT)

Variation morphologique de 4 individus (moyenne de 3 organes par individu):
Feuilles en moyenne à limbe 1.7--1.9 fois aussi longs que larges, à pétioles 32--56% de la longueur des limbes. Bractées sans longs poils glandulaires (poils glandulaires courts présents), en moyenne avec (7.7--)9.3--10 lobes, les lobes représentant 26--33% de la longueur de la bractée.

ELC602 Au pied d'une petit escarpement rocheux ombragé le long d'un sentier dans une forêt de feuillus avec Fagus grandifolia, Tsuga canadensis et Acer saccharum. En compagnie de Tussilago farfara, Onoclea sensibilis, Equisetum arvense, Viburnum lantanoides. Plusieurs frondes ont une apparence intermédiaire avec P. connectilis et une limbe en forme de larme et des pennes basales seulement 4.5 x plus longues que larges. Les frondes prélevées sont celles qui correspondaient le mieux à la description de P. excelsior.

Colonie d'environ 50 frondes, de 2 m carrés environ.

Spores de 56, 60, 60, 64, 70, 70, 72, 74, 76, 80 um de long. Fronde inclinées à 30˚ de l'horizontale dans leur partie distale, pennes basales étalées, +/-perpendiculaires au rachis, limbe triangulaire.