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Published In: Atti della R. Università Genova 1: 489. 1869. (Atti Reale Univ. Genova) Name publication detail
 

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Notes     (Last Modified On 3/10/2009)
general taxon notes:
Oreoweisia consists of 18 species in the world. Half of the species are restricted to South America. Three species are currently known from China. Oreoweisia torquescens (Brid.) Wijk & Marg., with Oreoweisia serrulata (Funck) De Not. as its synonym, was reported from Tianshan (Mt.), Xinjiang (P.-C. Chen et al. 1963; Tan et al. 1995). However, no specimens of Oreoweisia torquescens can be confirmed. Oreoweisia serrulata reported from Taiwan is O. laxifolia according to Iwatsuki (1969).

 

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25. Oreoweisia (Schimp.) De Not. 石毛藓属   shi-mao xian shu
Epil. Briol. Ital. [Atti R. Univ. Genova 1:] 489. 1869. Weissia subg. Oreoweisia Schimp. in B.S.G., Bryol. Eur. 1: 71 (fasc. 33–36 Mon. 11). 1846.
 
Plants slender and soft, green or brownish green, in tufts. Stems triangular, erect, usually branched, radiculose at base; central strand present in transverse section. Leaves curled or crispate when dry, erect-patent when moist, lanceolate to oblong-lanceolate or narrowly oblong-ovate to lingulate; margins serrulate above the middle or only at the apex; costa strong, narrow, subpercurrent to percurrent; upper cells rounded-quadrate, thick-walled, usually mammillose or papillose on both surfaces; lower cells rectangular, rather thin-walled, smooth; alar cells not differentiated. Autoicous. Perichaetial leaves similar to the upper stem leaves. Setae straight and elongate, 1–2 per perichaetium; capsules erect, sometimes slightly inclined, oblong-ovoid to cylindric, smooth when dry; opercula short- to long-rostrate; annuli in 1–3 row of cells, usually persistent; peristome teeth 16, inserted below the mouth, lanceolate, undivided, smooth or slightly perforate and irregularly striate. Calyptrae cucullate, smooth at base. Spores spherical, papillose or warty.
 
 
 

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1. Plants very small, only up to 5 mm high; leaves less than 1.3 mm long.................................... 3. O. weisioides
1. Plants more than 10 mm high; leaves more than 1.3 mm long..............................2
2. Plants larger, up to 5 cm high; leaves over 2 mm, up to 2.5 mm long; upper cells larger, quadrate or rounded-quadrate.................................................1. O. laxifolia
2. Plants smaller, up to 2 cm high; leaves ca. 1.5 mm long; upper cells smaller, rounded hexagonal....................................................................... 2. O. setschwanica

 

 
 
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