400 



Aristolochiaceae 



Braun Tai-rin-aoi. Leaves broadly ovate to nearly del- 

 toid-ovate, 8-12 cm. long, 5-10 cm. wide, long-petioled, 

 abruptly obtuse, short-pubescent on nerves above, glabrous be- 

 neath; flowers very shortly pedicelled, relatively large, gla- 

 brous, the perianth-tube depressed-pyriform, prominently con- 

 stricted at apex, 2-2.5 cm. long, finely net-veined inside, the 

 lobes orbicular-cordate or deltoid-orbicular, spreading, undu- 

 late on margin, 1-1.5 cm. long. Apr.-June. Honshu (w. 



Chflgoku Distr.), Kyushu (n. distr.). 



16. Asarum satsumense F. Maekawa. Heterotropa sat- 

 sumensis (F. Maekawa) F. Maekawa Satsuma-aoi. Re- 

 sembling No. 15; leaves broadly ovate-elliptic; flowers smaller, 

 the perianth-lobes prominently undulate on margin; styles 

 with a short, narrow auriclelike wing on each side near top. 

 May. Kyushu (s. distr.) . 



17. Asarum blumei Duchart. A. albivenium Regel; A. 

 leucodictyon Miq.; Heterotropa blumei (Duchart.) F. Mae- 

 kawa Ran'yo-aoi. Leaves solitary, broadly hastate-ovate 



to broadly ovate, 6-10 cm. long, 4-8 cm. wide, acute to obtuse, 

 the basal lobes more or less spreading, short-pilose on both 

 sides especially on nerves and on margin, long-petioled; flowers 

 glabrous, rather distinctly pedicelled, the perianth-lobes in- 

 flated, obtusely 4-angled, in lateral view, 1-1.2 cm. long and as 

 wide, slightly constricted at apex, net-veined inside, the lobes 

 spreading, ovate-orbicular, slightly incurved at apex, the throat 

 narrow. Mar.-May. Honshu (Izu, Sagami, Suruga Prov.). 



18. Asarum kiusianum F. Maekawa. Heterotropa \iusi- 



ana (F. Maekawa) F. Maekawa Tsukushi-aoi. Leaves 



usually oblong, 6-10 cm. long, acute, deeply cordate to slightly 

 hastate-cordate at base, smooth and scarcely lustrous above; 

 flowers prominently pedicelled, erect, straight, pale purple or 

 dull purple, the perianth nearly tubular, 10-15 mm. long, 

 slightly broadened above and somewhat constricted at apex, 

 with about 15 longitudinal ribs and lateral veinlets inside, the 

 lobes ovate-deltoid, spreading. Apr. Kyushu (nw. distr.). 



Var. tubulosum (F. Maekawa) F. Maekawa. A. tubu- 



losum F. Maekawa Akeeono-aoi. Flowers white, the 



perianth-tube scarcely broadened above. Kyushu. 



Var. melanosiphon (F. Maekawa) F. Maekawa. A. 

 melanosiphon F. Maekawa Kikyo-kan-aoi. Perianth- 



tube dark purple, the limb thinner, smooth inside, white to 

 paler purple. Kyushu. 



Asarum unzen F. Maekawa. Heterotropa unzen F. Mae- 

 kawa Unzen-kan-aoi. Intermediate between No. 18 and 



No. 15; flowers about 2.5 cm. across, the perianth-tube obo- 

 void-cylindric, the lobes similar to No. 15; styles simulating 

 No. 18. Kyushu (w. distr.). 



19. Asarum subglobosum F. Maekawa. Heterotropa 



subglobosum F. Maekawa Marumi-kan-aoi. Resembling 



No. 18, but the perianth-tube roundish, the limb nearly flat, 

 smooth. ^Kyushu (Hyuga Prov.). 



20. Asarum trigynum (F. Maekawa) Araki. Hetero- 

 tropa trigyna F. Maekawa Sanko-kan-aoi. Resembling 



No. 18, but with 3 styles and 6 stamens. Apr. Kyushu 



(KoshikilsL). 



21. Asarum yakusimense Masam. Heterotropa ya\u- 



slmensis (Masam.) F. Maekawa Yakushima-aoi. Leaves 



about 8 cm. long, deltoid-ovate, thinly pubescent beneath and 

 on petioles; flowers nearly sessile, 1.5-2 cm. across, dark 

 purple, the perianth-tube short-cylindric, pubescent outside, 



the limb often partially yellowish. Nov.-Feb. Kyushu 



(Yakushima and Tanegashima) . 



22. Asanun nipponicum F. Maekawa. Heterotropa nip- 



ponica (F. Maekawa) F. Maekawa; A. blumei sensu auct. 



Japon., non Duchart. Kan-aoi. Leaves flat, ovate to 



broadly so, 6-10 cm. long, 4-7 cm. wide, glabrous beneath, 

 subobtuse or subacute; flowers short-pedicelled, sometimes sub- 

 sessile, the perianth-tube campanulate, not constricted at apex, 

 with 9, rarely 12 longitudinal ribs and lateral veinlets inside, 



the lobes spreading. Oct.-Feb. Honshu (Kanto and centr. 



Distr.). 



Var. brachypodion F. Maekawa Suzuka-kan-aoi. 



Perianth-lobes larger, much longer than the tube; leaves with 



more or less impressed veinlets above. Honshu (Tokaido 



to Kinki Distr. and w. Hokuriku Distr.). 



Var. kooyanum (Makino) F. Maekawa. A. \ooyanum 



Makino Koya-kan-aoi. Perianth-lobes short, about half 



as long as the tube. Honshu (Kii Prov.) . 



Asarum rigescens F. Maekawa. Heterotropa rigescens 



(F. Maekawa) F. Maekawa Atsumi-kan-aoi. Perianth 



fleshy, strongly net-veined inside. Poorly known. Jan.-Feb. 



Honshu (Kinki and centr. Distr.). 



23. Asarum nankaiense F. Maekawa. Heterotropa nan- 

 \aiensis (F. Maekawa) F. Maekawa Nankai-aoi. Re- 

 sembles A. nipponicum but without impressed veinlets on 

 leaves above; flowers in bud with 3 impressions on perianth- 

 lobes, slightly constricted at base. Honshu (Kii Prov.), 



Shikoku. 



24. Asarum kumageanum Masam. Heterotropa \uma- 



geanum (Masam.) F. Maekawa Kuwa-iba-kan-aoi. 



Leaves long-petioled, thick, lustrous, cordate-oblong, 3-4 cm. 

 wide, acute, cordate at base, appressed-pilose only on nerves 

 above; flowers pedicelled, slightly pubescent, the perianth-tube 

 obconical, the lobes deltoid-orbicular, about 1 cm. long and as 

 wide, rounded at apex.- — — Feb.-Mar. Kyushu (Yakushima). 



25. Asarum savatieri Franch. Heterotropa savatieri 

 (Franch.) F. Maekawa Otome-aoi. Leaves ovate-orbicu- 

 lar to broadly ovate, 5-7 cm. long; flowers about 1.5 cm. across, 

 the perianth tubular-globose, slightly constricted at apex, about 

 1 cm. long, with 15-21 rows of delicate reticulations, the lobes 

 deltoid-ovate, spreading, the limb with a small mouth on the 



center. July-Aug. Honshu (Sagami, Izu, and Suruga 



Prov.). 



26. Asarum fauriei Franch. Heterotropa fauriei 



(Franch.) F. Maekawa Michi-no-ku-saishin. Rhizomes 



elongate, with long internodes; leaves 1-3, rounded to reni- 

 form-orbicular, about 3 cm. across, deep green and lustrous 

 above, not variegated; flowers small, 1-1.5 cm. across, the 



perianth-tube short; styles exserted from the tube. Apr.- 



May. Honshu (centr. and n. distr.). cv. Serpens. A. 



fauriei var. serpens F. Maekawa. SoNotj-sAisHiN. A 



cultivar of gardens with reniform-orbicular retuse lustreless 

 gray-green leaves with pale variegation above. 



Var. nakaianum (F. Maekawa) Ohwi. Asarum na\ai- 



anum F. Maekawa Miyama-aoi. Perianth-tube very 



short, cup-shaped, the leaves dull. Honshu (centr. distr.). 



27. Asarum viridiflorum Regel. Heterotropa viridiflora 

 (Regel) F. Maekawa- ^Moegi-kan-aoi. Leaves pale blue- 

 green, orbicular, relatively thin, flat, about 5 cm. wide; flowers 

 about 1.5 cm. across, the perianth-tube broadly tubulose, 5-9 

 mm. long, about 9 mm. across, very finely reticulate inside, the 

 lobes broadly deltoid-ovate, spreading. ^Mar.-Apr. Culti- 

 vated, but possibly indigenous in our area. 



28. Asarum takaoi F. Maekawa. Heterotropa ta\aoi 



(F. Maekawa) F. Maekawa Hime-kan-aoi. Leaves often 



paired, ovate-orbicular to ovate, broadly obtuse to subobtuse. 



