598 HYDRANGEACEAE 
PHILADELPHUS: L. Shrubs. Leaves deciduous: blades entire or 
tooth e Sepals 4 or 5, prominent. Petals convolute, relatively large, white 
-or pinkish. ones numerous, or very rarely 15. tyles present. Caps 
loculicidal.— About 50 species, North American and Eurasian.—SYRINGAS. 
MOCK-ORANGES.—Some species are much grown for their abundance of white 
flowers. 
Stigmas and upper part of styles distinct. 
eph few together, not more than 5: bark of last year's dd n ex- 
DIFLORI. 
lowers S racemose, numerous: bark of last year’s shoots gray 
. or cchre- colored, Bee exfoliating. II. CORONARII. 
Stigmas and styles ted. III. HiRSUTI. 
I. GRANDIFLORI 
Pedicel and hypanthium glabrou 
Base n mm ature HODARIDIUES attenuate to the pedicel, the point of union 
obscu 
Leaf-blades ovate or oval, entire or with minute distant 
teeth: sepals acute. 1. P. inodorus. 
motely toothed: sepals acuminate. P. grandiflorus. 
Base of the mature hypanthium abruptly contracted, it and 
the pedicel sharply differentiated. 3. P. gloriosus. 
Pedicel oe hypanthium, and outer surface of the sepals 
pubes 4. P. floridus. 
II. Coronaril 
Leaf-blades pubescent on the lower surface: hypanthium and 
calyx pubescen 5. P. latifolius. 
Leaf-blades glabrous or nearly so: hypanthium and calyx gla- 
brous witho 6. P. intectus. 
III. HIRSUT 
PE e erect or spreading branches: Mei brownish, more 
or S pubescent. T. P. hirsutus. 
1. B. s L. Shrub 2-3 m. high, the bark of the shoots brown, ex- 
ftiating pu bi ades ovate, e ovate or oval, acute at the apex, rounded 
or slight ly narrowed a t the base, 3—10 cm. 
long, glabrate or pig "hor appressed hairs 
either scattered copio especi- 
ally on the Dos surface, (thickly Cov- 
ered with de ff appre dim Res on the 
lower surfac and fre on the 
sepals, in P. a mo CN 
3-veined, entire or with vay distant teeth: 
ae wide.—Banks 
se pals acute: cor 3—4 e 
of streams and moist w ode various prov- 
inces, Ala. to Miss. Tenn. and N. C. 
P. grandiflorus ber: Shrub 2-3 m. 
m D bark of the shoots brown, exfoliat- 
ing: 
acuminate sharply dentate, either rounded 
8 
or narr wed at the base, 4-12 cm. lon 
glabrate or with dn appressed d 
3-veined: sepals ac co m. 
wide: capsule e. p the. S Ed RC e of streams and moist rocky 
slopes, Blue Ridge and Piedmont extending into Coastal Plain along river 
bluffs, —P. lazus $ ad., similar to the last, but with 
h narrower leaf-blade ore densely appressed pubescent on the lowe 
surface, and smaller and pei en flowers, is unknown to the writer in 
a wild state, aries apparently of eastern American origin. 
1 Contributed by Chauncey Delos Beadle. 
