A Lichenological Legacy – Festschrift Thomas H

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(Colour Plate 14E) Description: Prothallus well developed, reddish brown. Thallus effuse, squamulose, not radiating at the margin. Squamules medium sized, adnate or ascending, consisting mainly of deeply divided or coralloid, ca. 0.1 mm wide, up to 1 mm long, convex to almost terete, more or less geotropically arranged lobes; upper side pale green, slightly shiny, epruinose, finely tomentose; lobe tips paler than inner part, pubescent. Vegetative dispersal units lacking but lobe parts probably acting as lacinules. Upper cortex of type 1–2, 30–40 μm thick, not containing crystals. Medulla containing crystals not dissolving in K, PD+ orange, K–. Apothecia common, up to 1 mm diam., weakly to moderately convex, medium brown, rounded, simple to conglomerate, with an indistinct, finely pubescent margin when young. Excipulum pale brown in inner part, darker in the rim, K–. Hypothecium pale brown, K–. Epithecium pale brown to colourless, K–. Scattered crystals, not dissolving in K, occurring in the inner part of the exciple and hymenium. Ascospores narrowly ellipsoid, simple, 8–11 2.5–3 μm (n = 50). Chemistry: argopsin (major) and chlorophyllopsorin (minor). Notes: The species resembles P. buettneri but the squamules are epruinose and smaller, more narrow-lobed to almost terete, the ascospores are smaller, and the thallus lacks zeorin. In P. buettneri the lobes are up to 1 mm wide, the ascospores 11–14 × 3–3.5 μm (TIMDAL 2008b), and the thallus contains other combinations of compounds, always including zeorin. The paleotropical P. africana Timdal & Krog and some specimens of P. teretiuscula contain the same combination of compounds as P. hispaniolae. The former is an isidiate, broad-lobed species with a glabrous upper side, the latter forms more densely coralloid squamules with glabrous, or at most finely pubescent, tips. Phyllopsora hispaniolae is known from three localities in the Sierra de Baoruco in the Dominican Republic, collected in humid forests from 1740 to 1990 m altitude. The species is corticolous. 14. Phyllopsora imshaugii Timdal sp. nova Phyllopsorae cinchonaris similis, sed squamis minoribus, cortici tenuiori, ascosporis brevioribus, et thallo acidum norsticticum continenti. – Type: JAMAICA, Parish of Portland or St. Thomas, summit of Blue Mountain Peak, 7400 ft, X. 1952, Imshaug 13037 (MSC-25550, holotype) [norstictic acid (major)]; Parish of St. Thomas, summit of Mossmans Peak, Blue Mts, 6600 ft, Imshaug 14711 (MSC- 25546, paratype). (Colour Plate 14F) Description: Prothallus thin, white. Thallus effuse, crustose to squamulose. Squamules small, up to 0.2(–0.3) mm wide, adnate, isodiametrical, more or less scattered when young, later contiguous, more or less crenulate, plane to weakly convex; upper side medium green, somewhat shiny, epruinose, glabrous; margin concolorous with upper side, glabrous to pubescent. Isidia common, cylindrical, long, simple or branched. Upper cortex of type 1–2, 15–30 μm thick, containing a few scattered crystals dissolving in K. Medulla containing crystals dissolving in K 334 eschweizerbart_xxx
and recrystallizing by forming acicular, red crystals, PD+ yellow, K+ red. Apothecia common, up to 2 mm diam., plane when young, soon becoming weakly to moderately convex, medium brown to dark brown, rounded to irregular, simple to conglomerate, when young with a rather thick, paler, often weakly pubescent margin. Excipulum pale brown, darker in inner part, containing crystals dissolving in K and recrystallizing by forming acicular, red crystals. Hypothecium dark yellowish brown in upper part, paler below, not containing crystals, K–. Epithecium pale brown to colourless, K–. Ascospores narrowly ellipsoid to shortly bacilliform, simple, 10.5–14.5 3–4 μm (n = 40). Chemistry: norstictic acid (major). Notes: The isidiate thallus, white prothallus, distinctly marginate apothecia (at least when young), and dark brown hypothecium make the species most similar to P. cinchonarum. It differs, however, in having smaller squamules (often just areoles), a thinner upper cortex, shorter ascospores, and in containing norstictic acid. This compound is not previously reported from Phyllopsora. The species is known from two collections from the summit area of the Blue Mountains in Jamaica (2010–2260 m). The specimens were corticolous, partly also growing over corticolous bryophytes. 15. Phyllopsora intermediella (Nyl.) Zahlbr. Catal. Lich. Univers. 4 (25): 398 (1926). – Lecidea intermediella Nyl., Annls Sci. Nat., Bot., sér. 4, 19: 339 (1863). – Type: CUBA (see BRAKO 1991). – Description: BRAKO (1991). (Colour Plate 15A) Chemistry: no lichen substances (by TLC). Notes: The species is characterized by the pale green, closely adnate or sometimes slightly ascending, mainly isodiametrical squamules attached to a thick, reddish brown prothallus, and the long, cylindrical to partly flattened, sometimes branched isidia. Apothecia are rare and poorly developed in the West Indian material, but according to BRAKO (1991) they are yellow-brown. The ascospores are 7–9 2.5–3.5 μm in the type material (BRAKO 1991). It may be confused mainly with P. corallina, which differs in forming darker (often brownish) green, more ascending, elongated and imbricate squamules on a thinner, often white prothallus, and in having exclusively cylindrical isidia. The species is neotropical (BRAKO 1991). New to Haiti, Netherlands Antilles, and Puerto Rico. With the exception of the material from Cuba, all West Indian specimens were saxicolous. Specimens examined: CUBA. Wright s.n. (H-NYL 20558, holotype, TLC not performed), Wright, Lich. Cub. 183 (BM, UPS). HAITI. Imshaug & Wetmore 3026, 22511 (MSC). DOMINICAN REPUBLIC. Buck 8305 (NY). JAMAICA. Buck 5883 (NY). PUERTO RICO. Harris 23942 (NY). NETHERLANDS ANTILLES. Buck 50750 (B), Sipman 14819 (B). 335 eschweizerbart_xxx
Page 1 and 2: CBibliotheca Lichenologica 106, 319
Page 3 and 4: Material and methods Imshaug collec
Page 5 and 6: Table 3. Secondary compounds occurr
Page 7 and 8: Table 3. Secondary compounds occurr
Page 9 and 10: Phyllopsora breviuscula is pantropi
Page 11 and 12: 4. Phyllopsora canoumbrina (Vain.)
Page 13 and 14: 8. Phyllopsora cognata (Nyl.) Timda
Page 15: ellipsoid ascospores (7-13 2-3 μm
Page 19 and 20: 19. Phyllopsora leucophyllina (Nyl.
Page 21 and 22: 23. Phyllopsora minor Brako Mycotax
Page 23 and 24: seems to differ in forming marginal
Page 25 and 26: having a thinner upper cortex (15-3
Page 27 and 28: Specimens examined: CUBA. Monte Ver
Page 29 and 30: (Colour Plate 16F) Description: Pro
Page 31 and 32: 15 Medulla PD+ yellow (2,7-dichloro
Page 33 and 34: MENLOVE, J.E. (1974): Thin-layer ch
Page 35 and 36: 14 eschweizerbart_xxx
Page 37: 16 eschweizerbart_xxx

A Lichenological Legacy – Festschrift Thomas H

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