Colura acroloba Jovet-Ast
Creators: name: Singh, Sushil Kumar
name: Pócs, Tamás
name: Singh, Devendra
name: Kumar, Shashi
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Marchantiophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Colura
Colura acroloba

description: Colura acroloba (Prantl) Jovet-Ast   (Figs 1 A-P; 8A)  
 Revue Bryologique et Lichénologique 22: 297 (1953).   
 SPECIMENS EXAMINED. — India. Arunachal Pradesh, Tirap district Khonsa, II.1982, K.P. Singh s.n. (ASSAM); Mizoram, Lawngtlai, Ngengpui WLS, 22°29’49.7’’N, 92°46’33.1”E, 138 m, 01.XII.2012, S. K. Singh & Party 127584M; Ngengpui Wildlife Sanctuary, 22°29’52.2’’N, 92°45’49.1’’E, 134 m, 02.XII.2012, S. K.Singh & Party 127670A (ASSAM); Ngengpui Wildlife Sanctuary, 22°29’50.4’’N, 92°45’34.6’’E, 146 m, 02.XII.2012, S. K. Singh & Party 127680A (ASSAM); Ngengpui WLS, 22°29’29.9’’N, 92°45’22.5’’E, 170 m, 02.XII.2012, S. K. Singh & Party 127692C (ASSAM); Tripura, Jampui Hills, Longai river side, 23°50’48.9’’N, 91°57’44.7’’E, 470 m, 26.X.2015, S. Kumar TSLI-1315B, 1327C (ASSAM).   
 HABITAT. — Foliicolous, growing in association with Caudalejeunea lehmanniana, Cheilolejeunea trapezia, Cololejeunea floccosa, C. subfloccsa, Drepanolejeunea devendrae, D. foliicola, Lejeunea exilis, Leptolejeunea balansae, L. latifolia, L. maculata, L. epiphylla, Microlejeunea punctiformis, in relatively less moist places at elevation of 100-200 m a.s.l.   
 DISTRIBUTION. — India [Andaman & Nicobar Islands, Mizoram-present study, Arunachal Pradesh-present study, Tripura (Singh et al. 2016)], Cambodia, China, Fiji, Indonesia, Malaysia, New Caledonia, Papua New Guinea, Philippines, Samoa, Sri Lanka, Taiwan, Thailand, Vietnam, Australia (Tixier 1979, 1980; Grolle & Piippo 1984; Tan & Engel 1986; Piippo 1990; Zhu & So 2001; McCarthy 2006; Lai et al. 2008; Söderström et al. 2010; Söderström et al. 2011; Chuah-Petiot 2011; Thouvenot et al. 2011; Wang et al. 2011; Long & Rubasinghe 2014; Bakalin & Van Sinh 2016).   
A B E F C D H I J G K O L P M N  DESCRIPTION   Plants   
Light green when fresh, pale yellowish in herbarium; shoots 5-9 mm long, 1.7-2.2 mm wide including leaves, irregularly branched.   Stem   
In cross section suborbicular in outline, 62.5-85.0 µm, 4 cells across the diameter; cortical cells 7, subquadrangular, 17.5- 27.5 × 12.5-25.0 µm; medullary cells 3, rectangular-polygonal, 12.5-20.0 × 10.0-15.0 µm; ventral merophyte 1-2 cells wide. Rhizoids numerous, fasciculate at base of underleaves.   Leaves   
Contiguous-distant, obliquely-widely spreading; leaf lobes oblong-obovate, 0.8-1.1 mm long, 0.48-0.68 mm wide, dorsal margin arched, ventral margin straight except near apex, margin entire; marginal leaf cells towards apex subquadraterectangular, 15.0-32.5 × 12.5-20.0 µm; median leaf cells hexagonal-polygonal, 20.0-35.0 × 15.0-25.0 µm; basal leaf cells slightly elongated, hexagonal-polygonal, 30.0-55.0 × 15.0-35.0 µm; cells with cordate-nodulose trigones, intermediate thickenings 1-2 per cell wall; cuticle smooth; leaf lobules tubular, as long as lobe, slightly wider toward sac, lateral margin usually incurved, sac small inflated at middle, rounded at apex, margin entire, surface smooth, valve elliptical-ligulate, 110.0-127.5 × 75.0-82.5 µm, with 11-15 median cells surrounded by a ring of 20-25 hyaline cells.   Underleaves   
Distant, 3-4 times as wide as stem, 0.21-0.26 mm long, 0.21- 0.36 mm wide, deeply bilobed, sinus wide, lobes subulate, 7-10 cells long, 3-4 cells wide at base, margin entire.   Gemmae   
Present on the leaf lobe, discoid, 72.5-82.5 × 85.0-95.0 µm with 3 adhesive cells.   Androecia and gynoecia   
Not seen.
description: Published as part of Singh, Sushil Kumar, Pócs, Tamás, Singh, Devendra & Kumar, Shashi, 2020, A synopsis of Colura (Dumort.) Dumort. (Marchantiophyta: Lejeuneaceae) in India, pp. 111-129 in Cryptogamie, Bryologie 20 (10) on pages 112-114, DOI: 10.5252/cryptogamie-bryologie2020v41a10