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Polytrichastrum G.L. Sm. Search in The Plant ListSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Memoirs of The New York Botanical Garden 21(3): 35. 1971. (Mem. New York Bot. Gard.) Name publication detail
 

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Acceptance : Accepted
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Notes     (Last Modified On 4/3/2009)
general taxon notes:
There are about 13 species in the world, and eight species and one variety are found in China.

 

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6. Polytrichastrum G. L. Smith   拟金发藓属   ni jin fa xian shu
Mem. New York Bot. Gard. 21(3): 35. 1971.
 
Plants small to large. Stems erect, simple or branched, in scattered or gregarious tufts. Leaves densely crowded at stem tips, slightly crisped when dry, erect-spreading, sometimes fugacious when moist, basal leaves mostly scale-like, densely appressed; lanceolate or narrowly lingulate from a strongly sheathing base; lamellae on the ventral side of costa, sharply spinulose on the back above; margins entire or serrate; costa narrow; median cells nearly rounded to rounded quadrate, sometimes nearly oblate. Dioicous. Perigonia in rosettes; perigonial leaves short. Perichaetial leaves similar to the stem leaves, usually with broadly sheathing base. Setae slender; capsules erect or inclined, with 4–6 obtuse keels, cylindrical, apophyses usually distinct, with stomata at base of urns, epiphragm fleshy; peristome teeth mostly 64, rarely 32; annuli differentiated, deciduous; opercula beaked. Calyptrae cucullate, densely ciliate, yellowish hairy. Spores spherical or rounded ovoid, minutely papillose.
 
 
 
 

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1. Apical cells of leaf lamellae papillose............................................................................................2
1. Apical cells of leaf lamellae not papillose.......................................................................................3
2. Plants up to 10 cm high, often branched; lateral view of leaf lamellae truncate above, cross section of apical cells large, rounded ovate, grossly papillose................................................................. 1. P. alpinum
2. Plants shorter, not branched; lateral view of leaf lamellae rounded above; cross section of apical cells pyriform, strawberry-like papillae........................................................................................ 6. P. papillatum
3. Capsules ovoid-cylindrical or sometimes globose, keels not very distinct; apical cells of lamellae pyriform or flask-formed.................................................................................................................................4
3. Capsules cubic or prismatic, with 4–6 obtuse keels; apical cells of lamellae not pyriform, often broader than the lower cells...............................................................................................................................5
4. Leaf margins plane, clearly serrate; peristome teeth 32..............................................2. P. emodi
4. Leaf margins distinctly incurved, entire; peristome 64.................................................7. P. sexangulare
5. Stems often more than 10 cm high; leaf lamellae mostly in 60–80 rows; apical cells of lamellae not differentiated from the cells below.....................................................................................................6
5. Stems usually less than 10 cm high; leaf lamellae in less than 50 rows; apical cells differentiated or larger than the ones below..........................................................................................................................7
6. Plants dioicous; lamellae 35–65 µm high; apical cells entire.................... 3a. P. formosum var. formosum
6. Plants autoicous; lamellae (50–)60–80 µm high; apical cells crenulate...... 3b. P. formosum var. densifolium
7. Cross section of apical cells of leaf lamellae truncate; costa broad................................5. P. ohioense
7. Cross section of apical cells of leaf lamellae rounded ovate, nearly quadrate or arched; costa rather narrow..............................................................................................................................................8
8. Plants rather large, sometimes branched; apical cells of leaf lamellae rounded or nearly quadrate; the diameter of spores less than 15 µm................................................................................... 8. P. xanthopilum
8. Plants small, not branched; apical cells of leaf lamellae rounded; the diameter of spores larger than 15 µm, but less than 20 µm.......................................................................................................... 4. P. longisetum
 
 
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