台灣植物誌 第二版 Flora of Taiwan, 2nd edition Vol. 1
15. DENNSTAEDTIACEAE 碗蕨科
Terrestrial; rhizome slender, creeping or erect, solenostelic or rarely dictyostelic, clothed with hairs or mixed narrow scales. Fronds pinnate to pinnately decompound, not articulate to rhizome; veins free or anastomosing without included free veinlets. Sori terminal on the veins, with a up-shaped or 2-lipped indusium, or the lower lip lacking, or the other continuous along the margin and on the connecting-vein, protected by the reflexed margin or with double indusium; spopangia developing in gradate or mixed sequence, with almost vertical annulus. Spores tetrahedral or rarely bilateral.
A family of about 15 genera and 300 species, mainly tropical in distribution; seven genera and 24 species in Taiwan.
KEY TO GENERA
1. Sori terminal on the veins, with cup-shaped or half-cup-shaped indusiun or exindusiate.
2. Sori protected by a cup-shaped or half-cup-shaped indusium.
3. Sori marginal… 1. Dennstaedtia
3. Sori intramarginal… 4. Microlepia
2. Sori exindusiate (without true indusium).
4. Rhizome without true hairs; spores tetrahedral… 5. Monachosorum
4. Rhizome clothed with hairs; spores bilateral… 3. Hypolepis
1. Sori marginal, continuous along the margin, on a marginal connecting-vein, protected by the reflexed margin.
5. Rhizome clothed with hairs; sori with an inner (true) indusium.
6. Rachis zigzag; spores bilateral… 6. Paesia
6. Rachis straight; spores tetrahedral… 7. Pteridium
5. Rhizome clothed with scales; sori without an inner (true) indusium… 2. Histiopteris
1. DENNSTAEDTIA Bernh. 碗蕨屬
Rhizome creeping, solenostelic, clothed with rather stiff dark hairs. Fronds usually large, hairy or naked, more or less deltoid, pinnately decompound; veins free. Sori marginal, terminal on the veins; indusium formed by the fusion of an indusium in the strict sense and a minute tooth, to form a cupshaped or slightly bivalvate structure, usually deflexed towards the lower surface of the lamina, annulus of 12-28 thickened cells. Spores tetrahedral.
About 70 species, nearly all tropical, ranging north to Japan and the United States, south to Chile and Tasmania, four species in Taiwan.
KEY TO SPECIES
1. Stipe and rachis aculeate (spiny)… 3. D. scandens
1. Stipe and rachis hairy.
2. Frond up to 2 m long… 4. D. smithii
2. Frond under 50 cm long.
3. Frond deltoid, roughly hirsute, more than 15 cm wide… 2. D. scabra
3. Frond lanceolate or oblong-lanceolate,pilose, under 10 cm wide… 1. D. hirsuta