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Oleaceae 



lA. Internodes hollow; leaves sometimes ternately compound; calyx -lobes oblong, (5-) 6—7 mm. long, as long as the corolla-tube. 



1 . F. suspensa 



IB. Internodes with lamellate pith; leaves undivided; calyx-lobes elliptic, 2.5—3.5 mm. long, shorter than the corolla-tube. 



2A. Leaves glabrous; branches rather distinctly 4-angled 2. F. viridissima 



2B. Leaves with persistent pubescence beneath; branches nearly terete, with 2 shallow obsolete grooves 3. f. japonica 



1. Forsythia suspensa (Thunb.) Vahl. Ligustrum sus- 



pcnsutn Thunb.; Syringa suspensa Thunb.; Lilac perpensa 

 Lam.; Rangium suspensum (Thunb.) Ohwi; F. sieboldii Dipp.; 

 F. suspensa var. sieboldii (Dipp.) Zabel Rengyo. Gla- 

 brous, somewhat sprawly shrub; internodes hollow, the nodes 

 with solid pith; leaves simple or ternately compound, ovate 

 to broadly so, or elliptic-ovate, 4-8 cm. long, 3-5 cm. wide, 

 acute, rounded to broadly cuneate at base, acutely toodied ex- 

 cept at base, deep green, pale yellow-green beneath, the petioles 

 1-L5 cm. long; flowers solitary from a lateral bud, the pedicels 

 1-L5 cm. long, usually longer than the bud-scales; calyx-lobes 

 oblong, 6-7 mm. long, ciliate; corolla about 2.5 cm. across, the 

 lobes obovate-elliptic, about L5 cm. long, 8-10 mm. wide; fruit 



ovoid, about L5 cm. long, with scattered warty lenticels. 



Mar.-Apr. Chinese shrub much cultivated in our area. 

 2. Forsythia viridissima Lindl. Rangium viridissimum 



(Lindl.) Ohwi Shina-rengyo. Glabrous deciduous shrub 



with 4-angled, gray-brown branches, the pith lamellate; leaves 

 rather thick, oblong to lanceolate, rarely obovate-oblong, 6-10 

 cm. long, 1-3 cm. wide, broadest at or above the middle, acute, 

 cuneate at base, short-toothed on the upper half, deep green, 

 pale green beneath, the petioles 7-10 mm. long; pedicels 5-10 

 mm. long, as long as to slightly longer than the bud-scales; 



calyx-lobes elliptic, ciliate, 2.5-3 mm. long, erect, half as long 

 as the corolla-tube; corolla 2-2.5 cm. across, the lobes narrowly 

 oblong, about 15 mm. long, about 7 mm. wide, slightly re- 

 curved on margin; fruit broadly ovoid, about 1.5 cm. long, 

 nearly rounded at base. Apr. Chinese shrub rarely culti- 

 vated in our area. 



Forsythia koreana Nakai. F. viridissima var. \oreana 



(Nakai) Rchd. Chosen-rengyo. Leaves usually broadest 



on lower half; calyx slightly shorter than the corolla-tube, the 

 lobes obliquely ascending. Rarely cultivated. Korea. 



3. Forsythia japonica Makino. Rangium japonicum 



(Makino) Ohwi Yamato-rengyo. Deciduous shrub; 



branches grayish yellow-brown, nearly terete, with 2 shallow 

 obscure grooves or indistinctly 4-striate, glabrous; leaves mem- 

 branous, ovate to broadly so, 7-12 (-15) cm. long, 4-6(-8) cm. 

 wide, short-acuminate, usually toothed, glabrous, pale green 

 and more or less white-hairy, especially on the nerves beneath, 

 the petioles 6-8 mm. long, white-pubescent; pedicels 2-3 mm. 

 long, slightly shorter than the bud-scales; calyx-lobes elliptic, 

 2.5-3 mm. long, ciliate; corolla about 2.5 cm. across, the lobes 

 narrowly oblong, about 12 mm. long, 5-6 mm. wide; fruit 

 broadly ovoid, about 1 cm. long. Apr. Mountains; Hon- 

 shu (Chiigoku Distr.) ; rare. 



5. SYRINGA L. Hashidoi Zoku 



Shrubs or trees, glabrous or pubescent; branches with solid pith; leaves opposite, petiolate, entire or rarely pinnatifid; in- 

 florescence a paniculate thyrse; flowers white, rose-purple or lilac, rather small; calyx campanulate, small, irregularly toothed; 

 corolla tubular, the lobes 4, longer or shorter than the tube, valvate in bud; stamens 2, inserted on the throat or on the tube of 

 corolla, the filaments short or rather long; ovary 2-locular; stigma bifid; ovules 2 in each locule; capsules narrowly oblong, 

 terete or flattened, 2-valved; seeds flat, winged on back, the endosperm fleshy. About 30 species in Eurasia. 



1. Syringa reticulata (Bl.) Hara. Ligustrum reticula- densely many-flowered, glabrous or puberulent; flowers white. 



htm Bl.; Ligustrina amurensis var. japonica Maxim.; S. 

 amurensis var. japonica (Maxim.) Fr. & Sav.; S. japonica 



Maxim, ex Decne. Hashidoi. Deciduous small tree with 



glabrous, gray-brown branches; leaves ovate to broadly so, or 

 ovate-orbicular, 6-8(-12) cm. long, 3.5-6(-9) cm. wide, 

 abruptly acuminate or acute, rounded to shallowly cordate or 

 sometimes abruptly acute at base, entire, deep green and gla- 

 brous above, pale green and short, white-pubescent beneath 

 especially on the midrib, the veinlets reticulate beneath; pani- 

 cles large and rather broad, 15-25 cm. long, 10-15 cm. wide. 



fragrant, about 5 mm. across, short-pedicellate; calyx-teeth de- 

 pressed; corolla subinfundibuliform, the lobes ovate, about 2.5 

 mm. long, longer than the tube; filaments slightly longer than 

 the corolla-lobes, the anthers ellipsoidal, about 1.5 mm. long; 

 capsules narrowly oblong, 15-20 mm. long, smooth to loosely 

 lenticellate; seeds flat, wing-margined. June-July. Moun- 

 tains; Hokkaido, Honshu, Shikoku, Kyushu. 



Syringa vulgaris L. Lilac vulgaris Lam. Murasaki-ha- 

 SHiDoi. Often cultivated. Introduced from se. Europe. 



6. FRAXINUS L. Toneriko Zoku 



Deciduous, rarely evergreen, often dioecious trees ; leaves opposite, pinnately compound, very rarely simple, petiolate, toothed 

 or entire; flowers small, in terminal or axillary panicles or racemes, polygamous or unisexual; calyx minute, 4-lobed; petals 2, 

 4, or absent, free or united at base; stamens 2; ovary 2-locular, with 2-ovules in each locule; samara winged, 1-seeded; seeds nar- 

 rowly oblong. About 70 species, widely distributed in the N. Hemisphere, also in Mexico and Java. 



lA. Panicles from lateral buds, without leaves at base; leaflets sessile. 



2A. Leaf-rachis and inflorescence glabrous; samara about 4 cm. long, 8-15 mm. wide \. F. spaethiana 



2B. Leaf-rachis and inflorescence red-brown woolly; samara about 2.5-3.5 cm. long, 7-8 mm. wide 2. f . mandshnrica var. japonica 



IB. Panicles on young shoots, with few pairs of leaves at base. 

 3A. Petals absent; calyx small, cup-shaped, with small teeth, persistent; leaflets usually petiolate, often with multicellular crisped hairs 

 at base. 



4A. Leaflets abruptly acute to short-acuminate 3. f . japonica 



4B. Leaflets long-acuminate to caudate 4. f . longictispis 



