Oncophorus elongatus (I.Hagen) Hedenas

• Main Author: Lars Hedenäs
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Plantae; Bryophyta; Bryopsida; Dicranales; Dicranaceae; Oncophorus; Oncophorus elongatus; Nordland; Tromsø
• Online Access: https://doi.org/10.5281/zenodo.6009250; http://treatment.plazi.org/id/03E96F7DFFB5FFC55C6F8C53683D56C6

1. Oncophorus elongatus (I.Hagen) Hedenäs Fig. 6 Lindbergia 30: 36 (Hedenäs 2005). – Oncophorus wahlenbergii var. elongatus I.Hagen, TromsØ Museums Aarshefter 21–22: 13 (Hagen 1899). – Cynodontium wahlenbergii var. elongatum (I.Hagen) Mönk., Die Laubmoose Europas : 195 (Mönkemeyer 1927). – Type: “Norway. Nordland, Saltdalen, Rognanfjeld, 67º 6′ N, 600 m asl, 21 July 1889, R. E. Fridtz” (lecto-: O!, designated by Hedenäs 2005). Description Plants up to ten cm high, mostly in loose tufts, green or yellow-green. Stem with large central strand, a cortex plus epidermis of 1–2 layers of incrassate cells, epidermis not differentiated as a hyalodermis; axillary hairs with 2–8-celled, hyaline upper portion, 8–10 µm wide, basal 1–2 cells rectangular, brown; rhizoids strongly branched, red-brown, smooth, in leaf axils or shortly above. Leaves 2.5–6.4 × 0.4– 1.2 mm, when moist from strongly sheathing base erect, or erect-patent to spreading and straight or slightly curved, when dry with middle leaf spreading and gradually curved upwards or upwards-inwards and curled or slightly curled, from oblong-obovate or ovate sheathing portion (narrowed or strongly narrowed towards insertion) with long and almost linear, gradually narrowing upper portion, apex long- or very long-acuminate; leaf margin plane throughout, below entire, in upper 20–25(–35)% partly irregularly dentate or denticulate with sharp forwards-directed teeth, or sometimes relatively weakly denticulate, or some leaves almost entire and other leaves with scattered teeth along upper margin, teeth single or occasionally double, sometimes with cell walls projecting along upper margin, margin varying from unistratose to bistratose; costa 53–125 µm wide near base, with dorsal and ventral epidermis cells slightly widened but incrassate, one layer of large guide cells, 1–3 layers of ventral stereids and 2–3(–4) layers of dorsal stereids, sometimes with mammillae, or erect to forwards-directed teeth on upper back; lamina cells in acumen incrassate or strongly so, 10–21 × ...