506 HYDEANGEACEAE 



2. FHILADELPHUS L. 1 



Shrubs, with branching stems. Leaves opposite, deciduous: blades simple, 

 petioled: stipules wanting. Flowers solitary, corymbose or racemose, either terminal 

 or axillary. Hypanthium turbinate, adnate with the ovary. Sepals 4 or 5, persistent. 

 Corolla white or cream-colored. Petals 4 or 5, obovate or rounded, convolute in the 

 bud. Stamens numerous, inserted on the disk: filaments slender. Styles 3-5, united, 

 at least at the base: stigmas distinct or united. Capsule 3-5-celled, at maturity 

 loculicidally dehiscent by as many valves. Seeds very numerous, the membranous 

 testa prolonged at the ends. SYRINGA. MOCK ORANGE. 



Stigmas distinct. 



Flowers solitary or few, never more than five: bark of last year's shoots brown, exfoliating; 

 Pedicels and hypanthium glabrous. 



Base of the capsule attenuate to the pedicel, the point of union obscure. 

 Leaf-blades ovate or oval, the borders entire or with minute dis- 

 tant teeth: sepals acute. 1. P. inodorus. 

 Leaf-blades ovate-lanceolate or elliptic, the borders with sharp 



remote teeth: sepals acuminate. 2. P. grandiflorus . 



Base of the capsule abruptly contracted, the pedicel sharply differ- 

 entiated. 3. P. gloriosus. 

 Pedicels, hypanthium and exterior surface of the sepals pubescent. 4. P. floridus. 

 Flowers racemose, numerous: bark of last year's shoots gray or ochre-color, 



not exfoliating. 

 Leaf-blades pubescent on the lower surface: hypanthium and sepals 



pubescent. 5. P. latifolius. 



Leaf-blades glabrous or nearly so: hypanthium and exterior surface of 



the sepals glabrous. 6. P. intectus. 



Stigmas united. 7. P. hirsutus. 



1. Philadelphia moderns L. A shrub 2-3 m. high, the bark of the shoots 

 brown, exfoliating. Leaf-blades ovate, broadly ovate or oval, acute at the apex, 

 rounded or slightly narrowed at the base, 3-10 cm. long, 1.5-5 cm. broad, glabrate or 

 with short appressed hairs either scattered or more copious, especially on the lower 

 surface, prominently 3-nerved, entire or with minute distant teeth: sepals acute: 

 corolla 3-4 cm. wide. 



On banks of streams and moist woods, North Carolina to Mississippi and Tennessee. 

 Spring. A form, possibly specifically distinct, P. inodorus strigosus Beadle, may be recog- 

 nized by the thick covering of appressed rather stiff hairs on the lower surface of the leaves 

 and frequently on the exterior of the sepals. 



2. Philadelphia grandiflorus Willd. A shrub 2-3 m. tall, the bark of the shoots 

 brown, exfoliating. Leaf-blades ovate-lanceolate or elliptic, acuminate, sharply 

 dentate, either rounded or narrowed at the base, 4-12 cm. long, 1.54 cm. broad, 

 glabrate or with short appressed pubescence, 3-nerved: sepals acuminate: corolla 

 4-5 cm. wide: capsule attenuate to the pedicel. 



On banks of streams and moist rocky slopes, Virginia to Florida, mainly along the 

 mountains. Spring. P. laxus Schrad., similar to the last, but with much narrower leaf- 

 blades more densely appressed pubescent on the lower surface, and smaller and usually 

 solitary flowers, is unknown to the writer in a wild state, although apparently of eastern 

 American origin. 



3. Philadelphia gloriosus Beadle. A shrub 2-3 m. high, the bark of the 

 previous season 's growth dark brown, exfoliating. Leaf -blades ovate or elliptic, acute 

 at the apex, either rounded or narrowed at the base, 4-10 cm. long, 1.5-5 cm. broad, 

 glabrate or with short appressed hairs, remotely dentate, 3-nerved: hypanthium and 

 sepals glabrous : corolla 3-4 cm. broad : stigmas distinct : capsules abruptly contracted 

 at the base, about 1 cm. long. 



On rocky banks of the Coosa River, northwestern Georgia. Spring. 



4. Philadelphia floridus Beadle. A shrub 2-3 m. high, the bark of last year's 

 shoots dark brown, exfoliating. Leaf -blades oval or elliptic, acute, remotely toothed, 

 either rounded or narrowed at the base, 4-10 cm. long, 2-5 cm. broad, sparsely pubes- 

 cent on the lower surface, glabrate above, prominently 3-nerved: pedicels, hypanthium 

 and exterior surface of the acuminate sepals appressed pubescent: corolla 3-4 cm. 

 broad: stigmas not united. 



On rocky slopes and banks of streams, Floyd County, Georgia. Spring. 



1 Contributed by Mr. C. D. Beadle. 



