ICONES FILICUM SINICARUM 
PLATE 205 
ARCHANGIOPTERIS SOMAI Hayata 
ANGIOPTERIDACE 
ARCHANGIOPTERIS SOMAI Hayata, Ic. Pl. Form. 5: 256. 1915; 6: 154, fig. 60, t. 19. 1916; C. 
Chr. Ind. Fil. Suppl. I. 4. 1916; II. 26. 1933; Nakai in Bot. Mag. Tokio 41: 78. 1927; M. Genkai, 
Short Fl. Form. 1. 1936. 
Angiopteris Somat Hayata apud Makino et Nemota, Pl. Jap. 1563. 1925. 
Protangiopteris Somai Hayata in Bot. Mag. Tokio 42: 308. 1928. 
Stipe 50-60 cm long, sparsely scaly especially in the lower part, with one nodose swelling at about 25 cm 
above the base; lamina oblong-ovate, impari-pinnate with 2-3 pinnae on each side under the similar terminal 
one; pinnae 20 cm long, 4 cm broad, slightly oblanceolate, very gradually narrowed from the middle down- 
wards with a rather broadly cuneate base, apex caudate-acuminate with a linear acumen 3-4 cm long, 
alternate, petiolate (petiole about 1 cm long), margin repand, rather irregularly crenate-dentate above the 
base; texture thickly herbaceous or chartaceous, dry brown, nearly glabrous; veins very patent, alternately 
forked and simple; sori linear, to 15 cm long, medial, leaving a broad sterile space on each side of costa 
and along the margin, paraphyses shorter than sporangia and concealed when viewing from above; spores 
round or round-oblong, very minutely verrucose, hyaline. 
Taiwan: Bahao, T. Somai (type), December 1910; Rengechi, Taichu, S. Sasaki, March 3, 1927; Yama- 
mota and Mori, 2-3 November, 1932; Taihoku-syu, Bunzongun, Kanica, Y. Yamamota, July 24, 1938. 
A fairly common fern in the mountain forests in the southern, middle and northern parts of Taiwan 
Island and is quite near A. Henry: Christ et Gies. from Southeast Yunnan and seems to differ in elongate 
oblanceolate pinnae of a thicker texture with crenate-dentate and often repand margin. 
Plate 205. 1. Habit sketch (natural size). 2. Portion of pinna, showing venation,. serrature and sori (X 4). 
3. Scale from the lower part of stipe (X 30). 4. Cross section from the lower part of stipe (X 4). 5. Cross 
section from the middle of the stipe (X 4). 6. Cross section from the upper part of the stipe (X 4). 7. Two 
sporangia attached to the receptacle with paraphyses (X 20). 8. Paraphyses removed from the sori (X 100). 9. 
Spores (X 100), one enlarged (X 400). 
