The branching of Trichomanes proliferum (Hymenophyllaceae)

Abstract

HEBANT-MAURI, R. 1990. The branching of Trichomanes proliferum (Hymenophyllaceae). Can. J. Bot. 68: 1091-1097.The general morphology, anatomy, and meristem histology of Trichomanes proliferum were studied in order to explain the morphogenesis of this fern. As opposed to Bierhorst's conclusions, T. proliferum was found to be a typical fern with normal tetrahedral shoot apical cells and lenticular leaf apical cells. The leaf is a lateral production of the shoot apical meristem. This species is similar morphologically to other species in the genus Trichomanes: the shoot apical meristems on the creeping stolons produce "lateral systems," composed of a leaf and a bud, which are extraaxillary, as in other Trichornanes species with a creeping filiform stolon. The unique morphology of this fern is due to two supplementary branching systems: a lateral branching of the stolon, which is leafless at the fork, and an epiphyllous budding, which results in the formation of additional leaves by a different process of development.

Ecological diversity and adaptive tendencies in the tropical fern Trichomanes L. (Hymenophyllaceae) with special reference to climbing and epiphytic habits

“…A review of the precise ecological type or habitat of each species was extracted from literature data, especially floras (Copeland, 1933(Copeland, , 1938(Copeland, , 1947Baker & Posthumuis, 1939;Tardieu-Blot, 1951;Wessels Boer, 1962;Tindale, 1963;Vareschi, 1968;Brownlie, 1969;Hébant-Mauri, 1972;Kornas, 1976Kornas, , 1994Yoroi & Iwatsuki, 1977;Tagawa & Iwatsuki, 1979;Jacobsen, 1983;Iwatsuki, 1984Iwatsuki, , 1985Iwatsuki, , 1991Taylor, 1984;Brownsey & Smith-Dodsworth, 1989;Proctor, 1989;Burrows, 1990;Lellinger, 1991Lellinger, , 1994aLellinger, , 1994bParris, Beaman & Beaman, 1992;Prelli & Boudrie, 1992;Windish, 1992;Farrar, 1993;Duncan & Isaac, 1994;Pacheco, 1994;Smith, 1995;Stace, 1997;Bostock & Spokes, 1998;Sanchez, 2000;Prelli, 2001Prelli, , 1992, notes on herbarium specimens deposited at Paris (P), The Field Museum, Chicago (F), Berkeley (UC), Université de Montpellier II (MPU) and Université de La Réunion (REU), and personal field observations and communications (including Bolivia, Borneo, Colombia, Costa Rica, Ecuador, France (Normandy and Brittany), French Guiana, Germany (Palatina), Java, Madagascar, Malay Peninsula, New Zealand, New Caledonia, La Réunion, Venezuela).…”

“…To delimit the plant habit or growth form, which depends mainly on the characters of rhizome or stem, we selected several characters correlated with the rhizome (shoot): (i) the stem internode length; (ii) the stem rhizome thickness; (iii) the stem branching pattern (that is supposed to be related to internode length according to Hébant-Mauri, 1972); and (iv) the presence and structure of roots (fully studied by Schneider, 2000). Because of the problem of sampling homogeneity (i.e.…”

EvoDevo: Past and Future of Continuum and Process Plant Morphology

“…Leaves of ferns are often labelled as "fronds", because they have an evolutionary history different from the foliage leaves of seed plants [109,174] (see Section 3.5). Developmental mosaics between leaves and shoots are described for various recent ferns, e.g., Gonocormus (Trichomanes group) with shoot buds developing from the rachis [175]. To label a group of embryonic cells derived from the shoot apical meristem (SAM) as "leaf" is to label it according to its presumptive developmental fate (organ identity) under undisturbed conditions.…”