4 43. SAXIFKAGACE^. 



DiSTEiB. West Asia to Europe, and eastward to Japan ; but not yet 

 found in Central China. 



4. Hydrangea Linn. 



Key to tlie Formosan Sjxcies. 



( 1 ) Leaves quite entire. (2) 



Leaves more or less serrate. (3) 

 ( 2 ) Leaves elongately oblong nearly 20 cm. long H. integra. 



Leaves sbortely oblong, shortely cuspidate, less than 6 cm . . H. integrifdia. 

 ( 3 ) Leaves distinctly serrulate or serrate. (4) 



Leaves obscurely or remotely serrate, subentire or dentately serrate, 



quite glabrous H. cMnensis. 



( 4 ) Leaves glabrous, ovately oblong ; petaloidal sepals 4, entire, rounded, 

 emarginate H. glabra. 



Leaves hirsute lanceolate or oblong. (5) 

 ( 5 ) Leaves elongately lanceolate. (6) 



Leaves ovate acuminate ; petaloidal sepals. 4, serrate . . . .H. Kaiuahamii. 

 ( 6 ) Petaloidal sepals rounded obscurely serrate H. langifdia, 



Petaloidfxl sepals oblong quite entire H. angusiisepala. 



Hydrangea angustisepala Hayata Materials for a Plora of Formosa 

 p. 107. H. angustifdia Hayata Ic. PI. Formos. Fasc. I. PI. XXXII. 

 Scandent shrub? Branches subglabrous downward, fusco-nibescent 

 cinereo-tomentose upward. Leaves opposite, long oblong, or broadly 

 lanceolate, 12 cm. long, 3^ cm. broad, serrate, serras ascendent, hispid 

 above, villosely tomentose pallid beneath, petioles 1 cm. long. Cyme 

 terminal 7 cm. long as broad, branches slightly tomentose. Marginal flowers 

 sterile, long pedicellate, pedicels 1^ cm. long; sepals 4, petaloid, unequal, 

 outer ones longer, obovate, 14 mm. long 6 mm. broad, acute at the base, 

 margin obscurely dentate, inner ones smaller, 5 mm. long 3 mm. broad. 

 Fertile flowers : sepals 5, lanceolate, 2 mm. long, tomentose, obtuse at the 

 apex, petals 5, longer than sepal, long obovate obtus at the apex. Stamens 

 10, nearly 3 mm. long, anthers broadly orbicular, retused at both ends. 

 Ovary nearly superior or half-superior, styles 2-3, 1^ mm. long. 



