Pogonatum contortum (Menzies ex Brid.) Lesq.

Zhao, Wei, Wang, Zhaoming, Zheng, Lina, Naren, Gaowa, He, Qiang & Han, Wei, 2024, A step forward in botanical exploration with three new Polytrichaceae records from Tibet, China, Biodiversity Data Journal 12, pp. e 133971-e 133971 : e133971-

Pogonatum contortum (Menzies ex Brid.) Lesq.

Materials

Type status: Other material. Occurrence: catalogNumber: PE 2155369 ; recordNumber: 11634; recordedBy: Q. He; occurrenceID: 4CE59F90-8280-55CA-8FDE-83A136F6815C; Taxon: order: Polytrichales ; family: Polytrichaceae ; genus: Pogonatum ; Location: island: Asia; country: China; countryCode: China / CN; stateProvince: Tibet; county: Cona; municipality: Langpo; locality: Langpo Ditch ; verbatimLocality: Shannan; verbatimElevation: 3654 m; verbatimCoordinates: 27 º 47 ′ 55 " N, 91 º 48 ′ 51 ″ E; Identification: identifiedBy: Y. Jia and Q. He; Event: year: 2018; month: 6; day: 18; habitat: On the rocky soil surface; Record Level: language: cn

Type status: Other material. Occurrence: catalogNumber: PE 2155421 ; recordNumber: 11690; recordedBy: Q. He; occurrenceID: 9FBEF4E6-C16A-5962-B171-F48C9A28973C; Taxon: order: Polytrichales ; family: Polytrichaceae ; genus: Pogonatum ; Location: island: Asia; country: China; countryCode: China / CN; stateProvince: Tibet; county: Cona; municipality: Mama; locality: Wild Wolf Valley ; verbatimLocality: Shannan; verbatimElevation: 3220 m; verbatimCoordinates: 27 º 52 ′ 12 " N, 91 º 59 ′ 04 ″ E; Identification: identifiedBy: Y. Jia and Q. He; Event: year: 2018; month: 6; day: 11; habitat: On the forest floor; Record Level: language: cn

Type status: Other material. Occurrence: catalogNumber: PE 2155455, PE 2155456 ; recordNumber: 11728, 11729; recordedBy: Q. He; occurrenceID: B470F067-EF66-5DD4-B4FC-33C402E71ABD; Taxon: order: Polytrichales ; family: Polytrichaceae ; genus: Pogonatum ; Location: island: Asia; country: China; countryCode: China / CN; stateProvince: Tibet; county: Cona; municipality: Gongri; verbatimLocality: Shannan; verbatimElevation: 3045-3399 m; verbatimCoordinates: 27 º 54 ′ 36 " - 55 ′ 46 " N, 91 º 48 ′ 23 ″ - 49 ′ 09 " E; Identification: identifiedBy: Y. Jia and Q. He; Event: year: 2018; month: 6; day: 12; habitat: On the roadside soil surface; Record Level: language: cn

Description

Plants large, dark green, brownish-green when old, tufted in large patches (Fig. 2 a). Stems 5-10 cm long, usually simple. Basal leaves small, deciduous; upper leaves erect patent when moist, strongly crisped when dry, slightly constricted from rounded oval base to a broad lanceolate limb, sheathing indistinct, ca. 1 mm wide (Fig. 2 c); leaf marginal cells 1-2 layers, up to 3 cells wide, rarely remotely grossly toothed, teeth consisting of several cells, light brown; costae broad, with spines on the back; lamellae ca. 40 ranks, 2-3 cells high, disappearing along leaf margins, (Fig. 2 e and f); apical cells of lamellae slightly differentiated (Fig. 2 d), larger, round, 15-20 μm in diameter, thin-walled; other cells short-quadrate or nearly rectangular, 12-25 × 10-15 μm. Dioecious. Male plants dwarfed; perigonial leaves few. Setae single, dark brown, 20-30 mm long; capsules erect, narrowly ovoid, ca. 2.5 × 1.0 mm (Fig. 2 b).

Distribution

China (Tibet [present study]; Sichuan, Guangdong, Guangxi, and Hainan), Japan, Russia (Far East), and western North America ( Wu and Jia 2004).

Figures

Figure 2. Pogonatum contortum (Menzies ex Brid.) Lesq. a Plant; b Habit; c Leaf (ventral view); d Leaf apex; e Cross sections of leaf; f Part of cross sections of the lamellae of leaf. Scale bars: g = 1 cm (a); g = 2 cm (b); g = 3 mm (c); g = 1 mm (d); g = 200 μm (e); g = 100 μm (f).