606 HYDRANGEACEAE 



2. PHILADELPHUS L.i 



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. /loridus. 

 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. .'}. P- latifoUus. 



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



the sepals glabrous. 6. P. intectus. 



Stigmas united. 7. P. hirsutus. 



1. Philadelphus inodorus 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 apj^ressed 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. Philadelphus 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, 1.5-4 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. laxiis 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. Philadelphus 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. Philadelphus floridus Beadle. A shrub 2-3 m. high, the bark of last year 'a 

 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. 



"■ Contributed by Mr. C. D. Beadle. 



