SAXIFKAGACE^. (SAXIFRAGE FAMILY.) 147 



opening at the apex between the styles. — Erect shrubs, with opposite peti- 

 oled leaves, without stipules, and whitish or ])nrplish flowers, in ample com- 

 pound cymes ; the marginal flowers mostly sterile, with the calyx lobes enlaro-ed 

 and showy. 



1. H. arborescens, L. Smoothish; leaves ovate, acute or acuminate, 

 serrate, mostly rounded or cordate at the base ; cymes crowded, flat-topped ; 

 sterile flowers few or none. — Banks of streams. June -July. — Shrub 4°- 

 8*^ higii. Leaves 3'- 6' long. 



2. H. radiata, Walt. Leaves ovate, acuminate, serrate, mostly cordate 

 at the base, white-tomentose beneath ; cymes flat-topped; sterile flowers few. 

 — Rich soil on the mountains. May- June. — Shrub 4° -8° high. 



3. H. quercifolia, Bartram. Young branches and leaves densely to- 

 mentose ; leaves oval, sharply 5-lo1)ed, serrate; cymes clustered, forming a 

 close oblong panicle ; sterile flowers large, numerous. — Shady banks, Florida, 

 Georgia, and westward. May -June. — Shrub 3° -6° high. Leaves 4' -8' 

 long. Sterile flowers whitish, turning purjile. 



11. DECUMARIA, L. 



Flowers all fertile. Calyx tube turliinate, coherent with the ovarv, 7-10- 

 toothed. Petals valvate in the bud, oblong. Stamens 21 -30. Styles united, 

 persistent. Stigma thick, 7 - 10-rayed. Capsule 10- 15-ribbed, 7-IO-celIed, 

 bursting at the sides ; the thin partitions at length separating obliquely into 

 numerous chaffy scales. Seeds numerous, suspended. — A smooth climbing 

 shrub, with opposite ovate or oi)long entire or sei'rate leaves, and numei'ous 

 odorous white flowers in a compound terminal cyme. 



1. D. barbara, L. — Banks of streams. May -June. — Leaves shining, 

 sometimes puliescent. Capsule, with the persistent style and stigma, urn- 

 shaped, pendulous. 



• 12. PHILADELPHUS, L. Syringa. 



Calyx tube turbinate, cohering with the ovary, the limb 4-5-parted, per- 

 sistent. Petals 4-5, convolute in the bud. Stameu.s 20 - 40, shorter than the 

 petals. Styles mostly 4, more or less united. Capsule mostly 4-celled, locu- 

 licidally 4-valved, many-seeded. — Shrubs with simple opposite 3-5-ribbe(l 

 leaves, without stipules, and large white solitarj^ or cymose flowers. 



1. P. grandiflorus, Wilkl. Branches and leaves pubescent; leaves 

 ovate or ovate-oblong, acuminate, sharply serrate; flowers solitary, or 2 or 

 more in a terminal cyme ; calyx lobes ovate, acuminate, much longer than the 

 tiibe. — Banks of streams, chiefly in the upper districts. April - May. — Shrub 

 6°- 10° high, witli long and slender branches. 



2. P. inodorus, L. Smooth ; leaves entire or nearly so, ovate or ovate- 

 oblong, acute; calyx lobes ovate, acute, as long as the tube. — L^pper districts 

 of Alabama to South Carolina. May. — Flowers smaller than in the last. 



3. P. hirsutus, Nutt. Hairy ; leaves small, ovate, acute, sharply ser- 

 rate; flowers 1-3 together, terminal, and on sliort lateral branches: calyx 

 lobes ovate, as long as the tube. — Mountains, Alabama to North Carolina. — 

 A small shrub. Leaves 1' long. Flowers Y wide. 



