PART 1

and S. tagananae are transferred from other genera.
Additional specimens. FLORIDA. Citrus County: as type, Harris 31810; Hillsborough County: Hillsborough
River State Park, Rapids Trail along river, 28°09'N, 82°14'W, mixed harwoods, 3 Dec 1992, Harris 29647;
Liberty County: Apalachicola National Forest, mature Taxodium dome 2.7 mi NW of Sumatra on Fla. Hwy.
379, 28 Dec 1990, Harris 26104; Sarasota County: Myakka River State Park, 7 Mar 1937, Romer s.n.
MISSISSIPPI. Jasper County: Bienville National Forest, Forest Service Rd. 506-3 at E edge of forest by small
cemetery, 32°12'N, 89°13'W, ca. 105 m, dry oak woods on sand, 30 Sep 1992, Harris 28864 (all NY).
Strigula hypothallina R. C. Harris, sp. nov.
Thallo corticola nitido albo punctato, hypothallo nigro et ascosporis 1-septatis, 17-22 × 5-6 µm.
Type. SOUTH CAROLINA. Berkeley County: Francis Marion National Forest, Guilliard Lake Campground, on Ilex,
24 May 1967, Harris 3201-A (MSC, holotype).
Thallus light brown, shiny, with scattered white dots; hypothallus black, visible at thallus margin or in
section. Ascomata complanate to hemispherical, immersed, 0.5-0.8 mm diam.; wall black, sometimes
merging with hypthallus, lacking below. Asci cylindrical, 90-120 × 9-10 µm, with eight uniseriate spores.
Ascospores narrowly ovate, with ± pointed ends, 2-celled, slightly constricted at septum, 17-22 × 5-6 µm.
Microconidia and macroconidia not found.
Strigula cinefaciens is the only other corticolous species with a black hypothallus (not uncommon for
foliicolous taxa). It is distinguished by black not white dotted thallus. Although known only from the type, I
describe it to validate a name from my thesis and to expand the parallel character set shared by foliicolous
and corticolous taxa.
Strigula indutula (Nyl.) R. C. Harris, comb. nov.
Verrucaria indutula Nyl., Lich. Nov. Zel. 129. 1888. Porina indutula (Nyl.) Müll. Arg., Bull. Herb.
Boissier 2, App. 1: 92. 1894. Type. NEW ZEALAND. Knight (H-Nyl 1981, holotype).
As Nylander pointed out this species is close to S. albicascens differing in better developed thallus and
smaller ascospores, 5-7-septate, 16-20 × 4-5 µm.
Strigula jamesii (Swinsc.) R. C. Harris
I originally treated this species and our American material as S. affinis (Massal.) R. C. Harris but it was
pointed out to me by Brian Coppins, I believe, that the two are distinct. At the time I accepted this but did not
re-analyze the situation. I have now done so as far as possible with limited material. The ascospores are not
much different if one believes the published ranges, S. jamesii 12-20(-22) × 2-3.5 µm (Purvis et al., 1992), S.
affinis 12-20 × 3-6 µm (Roux & Bricaud, 1993). The macroconidia are also close, 13-17 × 3-3.5 µm for S.
jamesii, 13-18 × 3-5 µm for S. affinis. The distinctions seem to lie elsewhere, S. affinis has a well developed,
often rimose thallus and larger, more complanate ascomata while S. jamesii has a thin, continuous thallus with
small, more distinctly hemisphaerical ascomata. The ascospore width given by Purvis et al. (1992) for S.
jamesii does not agree with my observations which include the type. I would suggest these ascospore ranges
for the two species, S. jamesii 13-17 × 4-5 µm and S. affinis 15-22 × 4.5-6 µm. According to my analysis
American material is correctly placed in S. jamesii.
Strigula laceribracae R. C. Harris, sp. nov.
Thallo corticola albo, ascomatis immersis pariete hyalino vel pallido et ascosporis dense muriformibus,
11-15 × 1-5-septatis, 35-45 × 13-17 µm.
Type. GEORGIA. Murray County: Chattahoochee National Forest, Cohutta Wilderness, Tearbritches Trail from
Forest Service Rd. 68 to Bald Mountain, 34°52'N, 84°38'W, 1100-1200 m, mesic oak woods, 22 Sep 1992,
Harris 28170 (NY, holotype).
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