SAXIFRAGACEAE. — HYDRANGEA 37 
ENUMERATION OF THE SPECIES. 
Sect. I. EUHYDRANGEA Maximowicz in Mém. Acad. Sci. St. Pétersbourg, 
sér. 7, X. No. XVI. 7 (1867). 
Subsect. 1. PETALANTHAE Maximowicz, l. c. 
This subsection is taken here in a wider sense than in its original conception 
and includes all the species with a wingless or nearly wingless seed. The ovary 
is partly superior with 3-4 styles and the cymes are usually flat; the petals 
are spreading or reflexed and usually persistent during anthesis. Petioles 1-3, rarely 
5 em. long. 
1. Hydrangea chinensis Maximowicz, l. c. (1867) — Hemsley in Jour. Linn. Soc. 
XXIII. 273 (1887). 
Fokien: April-June 1905, S. T. Dunn (No. 2664). Formosa: Tamsuy, 1864, 
R. Oldham; Bankinsing, A. Henry (Nos. 98, 590, 1716). 
2. Hydrangea umbellata Rehder. See p. 25. 
3. Hydrangea Davidii Franch. See p. 25. 
4. Hydrangea yunnanensis Rehder, n. sp. go 
Frutex metralis v. ultra ramulis hornotinis dense strigilloso-villosulis, annotinis 
flavescentibus. Folia membranacea, oblonga v. oblongo-lanceolata, acuminata, 
basi cuneata, dentata v. dentieulata basi excepta, 7-12 cm. longa et 2.5-4 om. 
lata, supra luteo-viridia, sparse setulosa v. glabrescentia, ad costam dense strigil- 
loso-villosa, subtus ‘pallida, costa venisque setulosis exceptis glabrescentia v. in- 
terdum parce setulosa, utrinsecus 10-14-costata; petioli crispulo-villosi, circa 1 em. 
longi. Cyma fere plana v. convexa, radiis 5-7 oppositis remotis composita, strigi- 
loso-villosa; flores steriles 3-4 cm. diam., sepalis 3-4, late ovatis albis plerumque 
paucidentatis v. denticulatis; flores fertiles cyanei pedicellis plerumque receptaculo 
brevioribus; calycis dentes triangulari-ovati; petala obovato-oblonga, staminibus 
longioribus subaequilonga, circa 3 mm. longa; styli 3. Capsula ovoidea stylis 
persistentibus inclusis 4-5 mm. longa, pars libera fere duplo longior quam tubus 
calycis; styli apice valde recurvati stigmatibus fere circulum formantes; semina 
late elliptica, exalata. 
Yunnan: Mengtze, mountain forests to the north, alt. 2100 m., A. Henry (Nos. 
10236, 10236 B). Ap 
Closely related to H. Davidii Franch. which is easily distinguished by its linear- 
lanceolate sepals, lanceolate petals, longer and slenderer pedicels, suborbicular 
capsules and straight styles only slightly curved at the apex. 
5. Hydrangea Moellendorfii Hance in Jour. Bot. XII. 177 (1874). 
Kiangsi: near Kiukiang (ex Hance). a" 
have seen no specimen of this species, but as Hance states that it is closely 
related to H. hirta I assume that the inflorescence is peduncled and leafless as in 
that species, 
6. Hydrangea opuloides K. Koch, Dendr. I. 353 (1869). z 
Hydrangea japonica Siebold in Nov. Act. Acad: Leop.-Carol. XIV. pt. ii. 688 
(Syn. Hydrang.) (1829). 
Hydrangea opuloides, var. Hortensia Dippel, Handb. Laubholzk. IIL. 322 (1893). 
Hortensia opuloides k, Encycl. ITI. 136 (1789). — Jacquin, Fragm. Bot. 
7, t. 3 (1800). 
uen japonica Gmelin, Syst. IL. 722 (1791). — Zorn, Auswahl Schön. Gew. 
. 58, t. 149 (1796). ses 
Hydrangea hortensis Smith, Icon. Pict. t. 12 (1792). — Sims in Bot. Mag. XIII. 
t. 438 (1799). — Savi, FI. Ital. III. 65, t. 110 (1824). 
