Archilejeunea auberiana (Mont.) Steph.
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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. Cuba. Auber s.n. (holotype, PC-MONT; isotypes, W, YU).
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Synonyms
Lejeunea florentissima var. monotropa Spruce, Lejeunea florentissima var. calliadra Spruce, Lejeunea auberiana Mont., Archilejeunea florentissima (Spruce) Herzog, Archilejeunea parviflora var. florentissima (Spruce) Gradst. & Buskes
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Description
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Species Description - Autoicous. Plants 1.5-4 cm long × 1-2 mm wide, glossy light green to brown green, never becoming black, usually ascending and sometimes pendent when growing on twigs. Stems in cross section on average composed of 12-18 epidermal cells surrounding ca. 15-30 similar medullary cells; ventral merophyte 4-6 cell rows wide. Leaves imbricate, dorsal lobe ovate, 0.8-1 × 0.6-0.7 mm, apex rounded, plane, margins plane or slightly recurved, ventral margin curved, forming a wide angle with the keel; median cells about 20-40 µm in largest diam., trigones usually well-developed, intermediate thickenings 0-2 per cell, one per wall; oil bodies coarsely segmented, 3-6 in median leaf cells. Lobules occasionally reduced, when well-developed rectangular, 1/3-1/2 × lobe length, apex truncate, with two teeth separated from each other by a narrow sinus, the first tooth 2-5 cells long and 2 cells wide at base, the second tooth as large as the first tooth or (usually) shorter, the teeth erect or curved outwards, hyaline papilla positioned at the free margin in the sinus between the two teeth. Underleaves imbricate or distant, orbicular to broadly ovate-reniform, 3-4(4.5) × stem width, apex rounded, margins plane. Androecia and gynoecia as in the genus/subgenus. Sporophyte as in the genus.
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Discussion
Distribution and ecology: Archilejeunea auberiana occurs in dryer habitats than A. parviflora, grows more free from the substrate (appressed in A. parviflora), is lighter green in color and has a larger, less frequently reduced lobule with two distinct teeth. Otherwise the two species are very similar.
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Objects
Evans, Bull. Torrey Bot. Club 35: 179, Pl. 8. 1908 (as Archilejeunea viridissima); Gradstein and Buskes, Beih. Nova Hedwigia 80: 103, Fig. 3d. 1985 (as Archilejeunea parviflora var. florentissima).
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Distribution
Scattered throughout tropical America but almost lacking in Amazonia; at low elevations. Archilejeunea auberiana is a drought-tolerant species and grows on bark of trees and shrubs in rather dry locations: at the edges of rain forest, in seasonal forest, in open, secondary vegetation and on isolated trees.
Mexico North America| Chiapas Mexico North America| Oaxaca Mexico North America| Nicaragua Central America| Cuba South America| Matanzas Cuba South America| Trinidad and Tobago South America| Suriname South America| French Guiana South America| Ecuador South America| Pichincha Ecuador South America| Peru South America| Loreto Peru South America| San Martín Peru South America| Pará Brazil South America| Brazil South America| Rio Grande do Sul Brazil South America| São Paulo Brazil South America| Bolivia South America| Beni Bolivia South America| Santa Cruz Bolivia South America| Paraguay South America| Alto Paraná Paraguay South America|