A Lichenological Legacy – Festschrift Thomas H

4. Phyllopsora canoumbrina (Vain.) Brako
Mycotaxon 35: 12 (1989). – Lecidea canoumbrina Vain, Proc. Am. Acad. Arts Sci. 58: 135
(1923). – Type: TRINIDAD & TOBAGO (see BRAKO 1991). – Description: BRAKO (1991).
Chemistry: no lichen substances (by TLC).
Notes: This poorly understood species is characterized by the crustose thallus on a
thin, white or partly reddish brown prothallus, the cylindrical isidia, the medium
brown apothecia, the dark yellowish brown hypothecium, and the ellipsoid
ascospores (5–7.5 2.5–3 μm, n = 20, my measurements in TUR-V 23680). It
may be conspecific with the acid deficient chemotype of P. furfuracea, but differs
apparently in having a yellowish brown hypothecium and shorter ascospores. In
P. furfuracea the hypothecium is reddish brown and the ascospores 7–13 2–3
μm (TIMDAL 2008b).
In addition to the West Indian material, the species is known from a few
collections from Guatemala, Venezuela, and Brazil (BRAKO 1991). The report
from Jamaica [RIDDLE 1912, as Bacidia subgranulosa (Tuck.) Riddle], was based
on a specimen of P. pertexta (Cummings 118, NY).
Specimens examined: CUBA. Wright, Lich. Cub. 185 (BM, UPS, isolectotypes of Lecidea
parvifolia f. subgranulosa Tuck.). PUERTO RICO. Britton & Cowell 4235 (NY, isotype of Lecidea
granulifera Fink, TLC not performed). TRINIDAD & TOBAGO. Thaxter 19 (TUR-V 23680, isotype
of L. canoumbrina).
5. Phyllopsora chlorophaea (Müll. Arg.) Zahlbr.
Denkschr. Kaiserl. Akad. Wissensch. 83: 133 (1909). – Psora chlorophaea Müll. Arg., Flora 70:
320 (1887). – Type: BRAZIL (see SWINSCOW & KROG 1981). – Descriptions: TIMDAL & KROG
(2001), TIMDAL (2008b).
Chemistry: chemotype 1 (pantropical): no lichen substances or atranorin (trace to
minor); chemotype 2 (paleotropical): furfuraceic acid and sometimes atranorin
(trace).
Notes: The species is recognized by the ascending, lacinulate squamules attached
to a well developed, reddish brown prothallus, the dark brown apothecia, the dark
reddish brown (K+ purple) hypothecium, and the narrowly ellipsoid to fusiform
ascospores, 7–12.5 × 2.5–3 μm. All examined specimens from the West Indies
belong in chemotype 1, as all other examined specimens from the Neotropics (cf.
BRAKO 1991, TIMDAL 2008b).
When sterile, it may be confused with P. longiuscula, but differs in forming a
thallus consisting mainly of ascending squamules; areolae are few and mostly
elongated. In P. longiuscula the thallus is dominated by isodiametrical areolae and
ascending squamules are scattered. Admittedly, sterile, poorly developed material
may be difficult to identify. When fertile, the two species differ in the colour of
the apothecium, the colour of the hypothecium, and in the spore size. See also P.
confusa for discussion.
Phyllopsora chlorophaea is pantropical. New to Trinidad and Tobago.
Specimens examined: CUBA. Britton et al. 15491 (B), Buck 7693 (NY), Imshaug 24749 (MSC),
Johnson s.n. (NY), Pérez-Ortega s.n. (hb Pérez-Ortega). HAITI. Buck 9083 (NY), Imshaug &
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