364 



Salicaceae 



32A. Leaves sessile or nearly so, scarcely exceeding 4 cm. in length, usually opposite and entire, rounded to shallowly 



cordate and slightly clasping the branches, rounded to obtuse at apex 30. 5. Integra 



32B. Leaves distinctly petiolate, 6-16 cm. long, serrate, obtuse to acute and not clasping, acuminate to acute. 



33A. Petioles 2-5 mm. long; leaves linear-lanceolate, sometimes subopposite, obtuse to rounded at base; shrub cultivated 



and frequently naturalized 31.5. kpriyanagi 



33B. Petioles 2-8 mm. long; leaves always alternate. 



34A. Styles absent, the stigma entire 32. S. miyabeana 



34B. Styles short but distinct, the stigma bifid 33. S. gilgiana 



31B. Styles longer than the ovary, 2—3 mm. long; leaves white-pubescent beneath, with raised lateral nerves. 



35A. Adult leaves silky-pubescent beneath; bracts densely hairy 34. 5. gracilistyla 



35B. Adult leaves glabrous; bracts glabrous except at base 35.5. graciliglans 



30B. Stamen 1, or the flowers with 1 or 2 stamens in one ament. 



36A. Staminate aments 4-7 cm. long, about 4 mm. across; glands cylindric; bracts dark colored; pistillate araents 3-4 cm. long. 



36. S. buergeriana 

 36B. Staminate aments 2.5-4 cm. long, 6-10 mm. across; glands ovoid; bracts darkened above; pistillate aments 2-2.5 cm. 

 long. 

 37A. Stamen 1 ; bracts relatively short-villous; stipe of the ovary as long as the gland; leaves elliptic or narrowly ovate. 



37. 5. harmsiana 

 37B. Stamens 1 or 2; bracts long-villous; stipe of the ovary longer than the gland; leaves narrowly oblong 38. 5. sieboldiana 



1. Salix chaenomeloides Kimura. S. glandulosa See- 

 men, non Raf. Akame-yanagi. Tree; young branches 



hairy, soon glabrate, yellowish, rather slender; leaves with 

 petioles 5-12 mm. long with a small discoid gland near apex 

 on each side, the blades oblong or narrowly so, sometimes 

 elliptic, 5-12 cm. long, 1.5-5 cm. wide, short-acuminate, obtuse 

 to acute at base, serrate with incurved teeth, glabrous and 

 brownish red above while young, glaucous and glabrous or 

 slightly pubescent only near base beneath, the lateral nerves 

 many, rather prominent on both sides; staminate aments 2-6 

 cm. long, rather loosely flowered, the filaments glabrous, the 

 pistillate aments 2-4 cm. long in anthesis, 6-10 cm. in fruit, 

 the bracts 1.5 mm. long, short-pubescent; styles very short, the 

 stigma bifid; capsules about 3 mm. long, ovoid, glabrous, the 



stipe 1-1.5 mm. long. Honshu, Shikoku, Kyushu. 



Korea and China. 



2. Salix subfragilis Anderss. S. nipponica Fr. & Sav.; 

 S. triandra var. nipponica (Fr. & Sav.) Seemen; S. amygdalina 

 var. nipponica (Fr. & Sav.) C. K. Schn.; S. triandra sensu auct. 



Japon., non L.; S. hamatidens Lev.- Tachi-yanagi. Small 



tree or shrub; leaves with petioles 3-10 mm. long, the blades 

 ovate- to elliptic-lanceolate, sometimes broadly lanceolate, 5-12 

 cm. long, 5-25 mm. wide, long-acuminate, acute at base, ser- 

 rulate, whitish beneath, becoming glabrous, die lateral nerves 

 slender, rather many; staminate aments 2-5 cm. long, about 8 

 mm. across, rather densely flowered; stamens 3, the filaments 

 hairy below, the pistillate aments 2-3.5 cm. long; ovary gla- 

 brous, stipitate. Wet lowlands; Hokkaido, Honshu, Shi- 

 koku, Kyushu. Sakhalin, Ussuri, Manchuria, n. China, and 



Korea. 



3. Salix matsudana Koidz. cv. Tortuosa. S. matsudana 



var. tortuosa Vilm. Unryu-yanagi. Glabrous tree with 



slender tortuous, flexuous branchlets; leaves with petioles 2-8 

 mm. long, the blades linear-lanceolate, 5-8 cm. long, 4-10 mm. 

 wide, long-acuminate, serrulate, cuneate to rounded at base, 

 glaucous and slightly silky-pubescent beneath, becoming gla- 

 brate; aments 1-2 cm. long, the peduncles with entire leaves; 



ovary nearly sessile, the styles almost absent. Occasionally 



cultivated as a garden ornamental. The typical phase of the 

 species occurs in n. China, Korea, Manchuria, and e. Siberia. 



4. Salix eriocarpa Fr. & Sav. S. dolichostyla Seemen 



^Ja-yanagi. Trees; branches fulvous, short-pubescent; 



leaves with petioles 4-7 mm. long, the blades lanceolate, 7-12 

 cm. long, 8-20 mm. wide, acuminate, acute at base, serrulate, 



glabrous and glaucous beneath, slighdy short-pilose above, 

 the lateral nerves slender, rather many; aments appearing with 

 the leaves, the staminate nearly sessile, with few small leaves 

 at base, 8-20 mm. long, about 5 mm. across, densely flowered, 

 the bracts oblong-ovate, obtuse; ovary densely white-pubescent; 



style short, glabrous. Wet lowlands; Honshu, Shikoku, 



Kyushu. 



5. Salix babylonica L. S. pendula Moench Shidare- 



yanagi. Tree with the branches slender, pendulous, brown- 

 ish when old, short-pubescent to glabrate while young; leaves 

 with petioles S-S mm. long, the blades linear-lanceolate, 8-15 

 cm. long, 5-12 mm. wide, acuminate, serrulate, acute at base, 

 glabrous or with scattered appressed pubescence, glaucous be- 

 neath, the lateral nerves many; aments nearly sessile, 2-4 cm. 

 long in the staminate, 1-2 cm. in the pistillate, densely leafy 

 at base, the bracts narrowly ovate, with long hairs only at 

 base, 1.2-1.5 mm. long; ovary glabrous, nearly sessile; style 



very short, the stigma bifid, rather thickened. Cultivated 



in Japan, but spontaneous in centr. China. Introduced and 

 cultivated species related to S. babylonica are: 



Salix ohsidare Kimura. O-shidare. Branchlets thicker; 

 leaves longer (10-20 cm.), 2.3-4 cm. wide; peduncles 5-8 nun. 

 long; style slightly longer. Uncommon; Honshu (n. distr.). 



Salix elegantissima K. Koch. Rokkaku. Leaves lan- 

 ceolate, to 2 cm. wide, pale green beneath, the petioles 1-1.5 

 cm. long; pistillate aments to 5 cm. long, pedunculate; flowers 

 with 2 glands, the ovary short-stiped, pubescent on the lower 

 portion. 



6. Salix serissaefolia Kimura. Kogome-yanagi. Tree 

 with ascending grayish-brown branches, the branchlets short 

 grayish pubescent soon glabrate; leaves with short-pilose 

 petioles 2-6 mm. long, the blades thinly coriaceous, lanceolate 

 to broadly lanceolate, 4-7 cm. long, 8-12 mm. wide, gradually 

 long-acuminate, obtuse at base, serrulate, lustrous and yellow- 

 ish green above, whitish beneath, the lateral nerves slender, 

 spreading, paler colored and prominent above; pistillate 

 aments rather slender, 1-1.7 cm. long, short-pedunculate, 

 rather densely flowered, die bracts yellowish green, elliptic, 

 nearly truncate or rounded at apex, about 2 mm. long, hairy 

 only at base; ovary nearly sessile, with silky hairs near base; 

 style very short, the stigma linear; capsules ovoid, about 2.5 

 mm. long. Honshu (Kanto to Kinki Distr.). 



7. Salix yoshinoi Koidz. Yoshino-yanagi. Small tree 

 with grayish branchlets densely white-pubescent while young; 



