DiAPENSIACEAE 



689 



1. DIAPENSIA L. 



IWA-UME ZoKU 



Glabrous evergreen densely matted subshrubs with densely leafy branchlets; leaves coriaceous, alternate, spathulate, obtuse, en- 

 tire; flowers solitary, terminal, erect, pedunculate, white or pink, sometimes purplish; calyx 2- or 3-bracteate at the base, the seg- 

 ments broadly ovate, obtuse; corolla campanulate-infundibuliform, 5-lobed; stamens 5, inserted on the throat of the corolla-tube, 

 the filaments short, the anther-locules divergent, vertically dehiscent; staminodes absent; style filiform, die stigma obtusely and 



shordy 3-lobed; ovules numerous; capsules subglobose, 3-valved, the seeds numerous, nearly tetrahedral, small. Few species, 



in the Himalayas, China, and the cooler regions of the N. Hemisphere. 



1. Diapensia lapponica L. var. obovata F. Schmidt. 

 D. obovata (F. Schmidt) Nakai; D. lapponica subsp. obovata 

 (F. Schmidt) Hult.; D. lapponica sensu auct. Japon., non L. 



IwA-UME. Dwarf evergreen densely matted subshrub, 



1-3 cm. high, glabrous; leaves thick, obovate-spathulate, 7-15 

 mm. long, 3-5 mm. wide, rounded to refuse, entire, long- 

 decurrent and petiolelike at base, subclasping, lustrous above, 

 yellow-green beneath, irregularly rugose on upper side, with 

 1 or 2 short impressed lateral nerves when dried, the midrib 

 strongly impressed above; peduncles 1-2 cm. long, solitary, 

 terminal on the branchlets, nearly naked; bracts 2 or 3, elliptic, 



shorter than the calyx-segments, the lowermost bracts often 

 near die center of the peduncle; calyx-segments oblong, ob- 

 tuse to rounded, 5-6 mm. long, green, erect; corolla white, 1- 

 1.2 cm. across, the tube broad, the lobes elliptic-orbicular, 

 ascending, endre, rounded at apex; styles rather persistent, 

 narrowly cylindric, about 5 mm. long, truncate; capsules glo- 

 bose, erect, about 3 mm. across, surrounded by the persistent 



calyx. June-July. Dry slopes and rocky cliffs in alpine 



regions; Hokkaido, Honshu (centr. and n. distr.); common. 

 Sakhalin, Kuriles, Kamchatka, Alaska, and e. N. America. 



2. SHORTIA Torr. & Gray Iw.^-uchiwa Zoku 



Evergreen glabrous perennials with creeping branched stems; leaves radical, petiolate, ovate to depressed-orbicular, lustrous, 

 undulately toothed; flowers in racemes, solitary or few, scapose, one-sided, bracteate, rose-colored or white; calyx-segments 5, 

 obtuse, nerved, persistent, imbricate in bud; corolla-lobes 5, campanulate to infundibuliform, obtusely toothed to laciniate; anthers 

 dorsally attached, the staminodes linear to scalelike or clavate; style columnar, obsoletely 3-lobed; ovules many; capsules globose, 

 erect, dehiscent, 3-valved, surrounded by the persistent calyx; seeds many, small. Few species, in e. Asia and N. America. 



lA. Flowers solitary on the scape; corolla broadly campanulate, glabrous inside, the lobes deeply toothed; staminodes papillose, scalelike; 



calyx-segments glabrous, slenderly many-nerved \. S. uniflora 



IB. Flowers few on the scape or peduncle; corolla narrowly infundibuliform, with white mammillate-hairs inside, the lobes laciniate; 



staminodes linear, inserted on the tube below the middle; calyx-segments ciliate while young, 4- to 7-nerved. . . 2. 5. soldandloides 



tuse, 4- to 7-nerved, becoming coriaceous-chartaceous in fruit; 

 corolla rose-colored, narrowly infundibuliform, 1-1.5 cm. 

 across, white-hairy at base inside, the lobes ascending, laciniate; 

 capsules globose, 3-4 mm. across, the style persistent, 7-10 



mm. long. Apr.-June. Woods and thickets in mountains 



and sunny places in alpine regions; Hokkaido (w. distr.), 

 Honshu, Shikoku, Kyushu. Forma alpina (Maxim.) Ma- 

 kino. Sc/iizocodon soldandloides forma alpinus Maxim. 



Ko-iwA-KAGAMi. Dwatf alpine phase. 



Var. minima (Makino) Masam. Shortia soldandloides 



forma minima Makino; S. ya\ttsimensis Masam. Hime- 



Ko-iwA-KAGAMi. Very dwarf phase with few-toothed or en- 

 tire leaves. Flowers mostly solitary. High mountains of 



Yakushima. 



Var. magna Makino. Schizocodon soldandloides var. mag- 

 ntts (Makino) Hara; Shortia magna (Makino) Makino; Schi- 

 zocodon magniis (Makino) Honda O-iwa-kagami. Larger 



montane phase with leaves 8-12 cm. long and as wide. 



Rather abundant in the western region. 



Var. ilicifolia (Maxim.) Makino. Schizocodon soldand- 

 loides var. ilicijolius (Maxim.) Makino; S. iticifolius Maxim.; 



Shortia ilicijolia (Maxim.) Takcda Hime-iwa-kagami. 



Leaves smaller, ovate-orbicular, with few, coarse, deltoid teeth 



nearly confined to the upper half. Woods in mountains; 



Honshu, Kyushu; rather rare. 



Var. intercedens Ohwi. Schizocodon ilicijolia var. inter- 



cedens (Ohwi) Yamazaki Yama-iwa-kagami. Leaves 



broadly ovate, abrupdy narrowed at tip, whitish beneath, with 



5-15 coarse teeth on each side; flowers white. Woods in 



mountains; Honshu (Tokaido); rare. 



1. Shortia uniflora (Maxim.) Maxim. Schizocodon tini- 



florus Maxim. IwA-ucHrwA. Stems slender, creeping, 



rather firm, sparingly branched; leaves few, approximate near 

 the top of the stems and branches, long-petiolate, firm, 

 slightly lustrous, depressed-orbicular to cordate-orbicular, 2.5-7 

 cm. long and as wide, rounded to retuse, cordate to rounded at 

 the base, undulately toothed, with slightly raised nerves; scapes 

 erect, to 15 cm. long, with few bud-scales at base, the bracts 

 about 3, acute or subacute, broadly lanceolate, usually closely 

 condguous or the lowest widely separated from the calyx, 

 slightly shorter than the calyx-segments; calyx segments green, 

 oblong, glabrous, slenderly many-nerved, 8-12 mm. long, 

 thick-papery; corolla pale rose-colored, 2.5-3 cm. across, gla- 

 brous, the lobes deeply and obtusely toothed; capsules ovoid- 

 globose, 4-5 mm. across, mucronate, the valves somewhat 

 coriaceous; seeds dark brown, oblong, about 0.7 mm. long, 



finely veined. Apr.-May. Woods in mountains; Honshu 



(Kinki Distr. and eastw.). 



2. Shortia soldanelloides (Sieb. & Zucc.) Makino. Schi- 

 zocodon soldandloides Sieb. & Zucc; Schizocodon soldanel- 

 loides var. gcnuinus Makino; Shortia soldanelloides var. genti- 



ina (Makino) Makino Iwa-kagami. Glabrous perennial 



with creeping, loosely branched, slender stems and branches; 

 leaves few, coriaceous, disposed mostly at end of stem, long- 

 pedolate, orbicular to ovate-cordate, 3-6 cm. long, 3-5 cm. 

 wide, deep green and lustrous on upper side, short-toothed; 

 scapes 10-30 cm. long, with few bud-scales at base; racemes 

 one-sided, 3- to 10-flowered, the bracts lanceolate or broadly 

 linear, shorter than the calyx, the pedicels shorter than the 

 flowers, erect after anthesis; calyx segments narrowly oblong, 

 5-10 mm. long, loosely ciliate near tip when young, very ob- 



