512 



Saxifragaceae 



brescent shrub with slender, purple-brown branches; leaves 

 broadly lanceolate, 8-15 cm. long, 2-4 cm. wide, long-acumi- 

 nate, coarsely toothed, paler beneath, the petioles 8-15 mm. 

 long; inflorescence rather small, with few neutral marginal 

 flowers; calyx-teeth of bisexual flowers narrowly deltoid; 

 petals broadly spathulate; anthers elUptic; capsules broadly 

 ovoid, 4-5 mm. long inclusive of the rather prominent styles. 



Woods along streams and ravines at low elevations in the 



mountains; Kyushu (Yakushima). Ryukyus, Formosa, and 



China. 



8. Hydrangea scandens (L. f.) Ser. Viburnum scan- 

 dens L. f.; V. virens Thunb.; H. virens (Thunb.) Sieb. 



Gaku-utsugi, Konterigi. Sparingly short-pilose or nearly 

 glabrous shrub with slender gray-brown branches; leaves 

 ovate-oblong, 5-8 cm. long, 2-3.5 cm. wide, narrowly ovate or 



oblong, somewhat chartaceous, acuminate, vivid-green above, 

 short-toothed, paler beneath, the petioles 3-10 mm. long; in- 

 florescence rather small, with few neutral flowers; calyx-teeth 

 of the bisexual flowers small, deltoid; petals obovate; anthers 

 subglobose; capsules broadly ellipsoidal, 4-5 mm. long, in- 

 clusive of slightly spreading styles. ^May-June. Honshu 



(Tokaido and Kinki Distr.), Shikoku, Kyushu. 

 9. Hydrangea luteovenosa Koidz. H. virens sensu 



Sieb. & Zucc, excl. syn., non Sieb. Ko-gaku-utsogi. 



Closely allied to the preceding but somewhat smaller, with 

 purple-brown branches, the leaves often tinged dark purplish, 

 3-5 cm. long, 1-2 cm. wide, acute or short-acuminate, the teeth 

 prominent but fewer, the petioles 2-5 mm. long; petals slightly 



larger, acute to mucronate. Apr.-June. Honshu (Izu Prov. 



and westw.), Shikoku, Kyushu. 



16. PHILADELPHUS L. 



Baika-utsugi Zoku 



Deciduous shrubs; leaves short-petioled, opposite, toothed or sometimes entire, 3- to 5-nerved; inflorescence a raceme, cyme, 

 or panicle; flowers rarely single, white, 4-merous; calyx-tube obconical, the lobes valvate in bud; petals rather large, imbricate in 

 bud, white; stamens many; styles 4, connate below; ovary 4-locular, nearly inferior; capsules 4-valved, dehiscent; seeds small, 

 many. Temperate regions of the N. Hemisphere. 



1. Philadelphus satsumi Sieb. ex Lindl. & Paxt. P. 

 satsumanus Sieb. ex Miq.; P. matsumwanus Koehne; P. acumi- 

 natus Lange; P. coronarius var. satsumi Maxim.; P. schren\ii 



sensu auct. Japon., non Rupr. Baika-utsugi. Thinly 



pubescent shrub, the second-year branches brownish, the bark 

 longimdinally split and peeling; leaves ovate, to narrowly so 

 or oblong, 5-8 cm. long, 2-3.5 cm. wide, long-acuminate, 

 sparsely short-toothed, sometimes slightly pilose above, paler 

 and nearly glabrous beneath except tufts of axillary hairs, the 

 petioles 5-10 mm. long; racemes about 10-flowered; flowers 



white; calyx-mbe and pedicels often puberulous; calyx-lobes 

 ovate, acute, 4-5 mm. long; petals broadly ovate, 12-15 mm. 

 long; styles pilose to glabrous. May-July. Honshu, Shi- 

 koku, Kyushu. Forma nikoensis (Rehd.) Ohwi. P. satsu- 

 manus var. ni\oensis Rehd. ^Ke-baika-utsugi. Leaves 



prominently pubescent beneath. 

 Var. lancifolius (Uyeki) Murata. P. shi\o\ianus Nakai; 



P. shi\okjanus var. lancifolius Uyeki Shikoku-utsugi. 



Styles pilose near the base. Honshu, (Tokaido and Kinki 



Distr.), Shikoku, Kyushu. 



17. DEUTZIA Thunb. Utsugi Zoku 



Deciduous or sometimes semi-evergreen stellate-pubescent shrubs; leaves opposite, short-petioled, exstipulate, usually dentate; 

 flowers in racemes, cymes or sometimes solitary, white; calyx-teeth 5; petals 5; stamens 10, the filaments winged, usually with a 



tooth on each side at tip; ovary inferior; styles 3-5, free; capsules 3- to 5-valved; seeds minute, many. e. Asia, Himalayas, and 



Mexico. Our species have the petals valvate in bud. 



lA. Flovi^ers in panicles or racemes. 



2A. Leaves all alike, petiolate, sometimes subsessile; filaments toothed. 



3A. Leaves grayish brovi^n on upper side, densely stellate-pubescent beneath. 



4A. Leaves rather thick, pale green beneath I. D. crenata 



4B. Leaves membranous, densely stellate-pubescent and whitish beneath 2. D. maximowicziana 



3B. Leaves vivid-green, glabrous to thinly stellate-pubescent beneath 3. D. gracilis 



2B. Leaves slightly dimorphic, sessile and barely clasping in those immediately below the inflorescence, very short-petiolate in the others; 



filaments of the longer stamens without teeth 4. D. scabra 



IB. Flowers 1, very rarely 2, from lateral buds of the previous year, usually without basal leaves 5. D. tmiflora 



1. Deutzia crenata Sieb. & Zucc. D. scabra Thunb., Var. nakaiana (Engl.) Hara. D. floribunda Nakai, non 



pro parte Utsugi. Shrub; leaves ovate to broadly lanceo- Lemoine; D. na\aiana Engl. Ko-utsugi. Leaves relatively 



late, 3-6 cm. long, 1.5-3 cm. wide, acuminate to subobtuse, narrower, with shorter teeth, the flowers smaller and more 



with 4- to 6-rayed stellate hairs above, pale green and with 10- numerous, the petals 5-8 mm. long, the capsules about 3 mm. 



to 15-rayed stellate hairs beneath; petioles 2-5 mm. long; in- across. Honshu (w. distr.), Shikoku, Kyushu. 



florescence a simple raceme sometimes branched at base; calyx 2. Deutzia maximowicziana Makino (Feb. 1892). D. 



with simple and stellate hairs; petals about 15 mm. long; discolor Maxim., non HemsL; D. hypoleuca Maxim. (Nov. 



styles 3-4; capsules 3.5-6 mm. across. May-June. Hok- 1892) Urajiro-utsugi. Closely allied to the preceding, 



kaido, Honshu, Shikoku, Kyushu; common and very variable. but the branches more slender; leaves green, acute to acumi- 



Var. heterotricha (Rehd.) Hara. D. heterotricha Rehd.; nate, minutely toothed, membranous, white stellate-pubescent 



D. hebecarpa Nakai; D. ferruginea Satake Birodo-utsugi. beneath. May-June. Honshu (Shinano Prov. and westw.), 



Leaves beneath, pedicels and calyx-tube with spreading hairs. Shikoku. 



Honshu, Kyushu. 3. Deutzia gracilis Sieb. & Zucc. D. nagurae Makino; 



