Frullanoides corticalis (Lehm. & Lindenb.) van Slageren
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Authority
Gradstein, S. Robbert. 1994. Lejeuneaceae: Ptychantheae, Brachiolejeuneae. Fl. Neotrop. Monogr. 62: 216. (Published by NYBG Press)
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Family
Lejeuneaceae
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Scientific Name
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Type
Type. Jamaica. Lehmann s.n. (holotype, S; isotypes, G, W).
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Synonyms
Frullania leprieurii Nees & Mont., Lejeunea linguaefolia Taylor, Brachiolejeunea surinamensis Steph., Jungermannia corticalis (Lindenb.) Lehm., Phragmicoma corticalis (Lehm. & Lindenb.) Gott, Lindenb. & Nees, Ptychocoleus corticalis (Lehm. & Lindenb.) Trevis., Lejeunea corticalis (Lehm. & Lindenb.) Bosw., Brachiolejeunea corticalis (Lehm. & Lindenb.) Schiffn., Trocholejeunea corticalis Lehm. & Lindenb., Phragmicoma leprieurii (Nees & Mont.) Mont., Acrolejeunea linguaefolia (Steph.) Spruce ex
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Description
Species Description - Dioicous (rarely autoicous). Plants up to 2,5 cm long × 1,2-1.7 mm wide, brown green to black when alive, becoming dark brown to black in the dried condition. Branching Lejeunea-type, occasionally Frullania-type. Stems 0.15-0.2 mm in diam., in cross section composed of 11-14 epidermal cells surrounding 17-40 smaller, thicker-walled medullary cells, dorsal epidermal cells slightly larger than the ventral epidermal cells; ventral merophyte four cell rows wide. Leaves imbricate, dorsal lobe ovate to ovate-oblong, 0.6-0.9 × 0.5-0.6 mm, apex rounded, plane or recurved, dorsal margin straight to cordate at base, ventral margin plane, when spread out forming an angle of 150-170° with the keel; median cells 30-40 × 18-30 µm, base cells larger, margin cells subquadrate, 14-20 µm high; oil bodies not observed. Lobules narrowly ovate, averaging 0.4 × 0.25 mm, 2/5-l/2× lobe length, apex oblique, keel slightly curved, free margin plane, straight except at the base, with 3-6 teeth, separated from each other by 2-4 margin cells (except the second and third tooth which are 3-8 cells apart), the teeth 1-3 cells long, inflexed, the first tooth rather inconspicuous, located in the sinus at the extreme end of the lobule; hyaline papilla near the base of the 2nd tooth. Underleaves imbricate, suborbicular to broadly ovate, 0.35-0.45 × 0.4-0.55 mm, ca. 3-4× stem width, apex rounded to truncate, plane, margins plane, bases rounded, auricles lacking, insertion line arched or almost straight. Androecia on long or short branches, bracts in 4-15(-22) series, hypostatic except in the basal and apical series, antheridia two per bract. Gynoecial bracts bifid to 1/4-1/2, keel winged, lobes obovate-oblong, 0.9-1.2 mm long, concave or squarrose, apex narrowly rounded, lobules narrow rectangular, l/2-3/4× lobe length, apex acute or rounded; bracteoles erect, gibbous, rectangular, 0.7-1 mm long, apex rounded to truncate-emarginate, slightly recurved, margins plane. Perianths exserted to 1/5-1/3, occasionally stalked, ovoid-cylindrical, 0.7-1.3 mm long, with 5-8(-10) keels restricted to the upper half of the perianth, beak 4-7 cells long. Spores 50-60 µm long; elaters 30 per capsule, 290-400 × 15 µm, with a single brown, ca. 4 µm wide spiral.
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Discussion
Pale phases of Frullanoides corticalis, without blackish pigmentation, bear close resemblance to Acrolejeunea spp. They differ from Acrolejeunea, when sterile, by the presence of a small tooth at the extreme end of the free margin of the lobule, where it meets with the ventral margin of the leaf. Sometimes this tooth is incurved and inconspicuous, however. The lack of the tiny, upright flagelliform shoots, characteristic for the neotropical species of Acrolejeunea, is another character to distinguish sterile plants of F. corticalis from Acrolejeunea.
Illustration: Schuster, Hep. Anth. N. America IV: Fig. 651. 1980 (as Brachiolejeunea corticalis); van Slageren, Meded. Bot. Mus. Herb. Utrecht 544: Pls. XVII, XVIII. 1985.
Distribution and Ecology: Indies and coastal regions of Central and South America, ranging from sea level up to about 600 m on Cuba. Frullanoides corticalis is a drought-tolerant species which grows on bark or rock in coastal areas: in mesic to xeric woodlands, in swamps and mangroves, in plantations, and on isolated trees in towns and villages. The species may locally be very common and may form extensive black mats on bark of trees along the beach. Like F. bahamensis, the species is tolerant of salt spray. Although F. corticalis has similar habitat preferences as F. bahamensis, the two species apparently do not grow mixed when occurring in the same general area (Schuster, 1980)
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Objects
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Distribution
Mexico North America| Veracruz Mexico North America| Honduras Central America| Atlántida Honduras Central America| Belize Central America| Nicaragua Central America| Chontales Nicaragua Central America| Costa Rica South America| Panama Central America| Panamá Panama Central America| United States of America North America| Florida United States of America North America| Bahamas South America| Cat Island Bahamas South America| Cuba South America| La Habana Cuba South America| Jamaica South America| Portland Jamaica South America| Haiti South America|