ORDER LXVI. RUBIACEJE. 343 



tire, or slightlv serrate. — White. "•? . April — May. Low country. 

 2—3 feet. 



Genus VL— SAMBU'CUS. Tourn. 5—3. 

 (From sambuke, a musical instrument made from the wood.) 



Calyx 5-parted. Corolla 5-cleft. Stamens 5. Stigmas 3. 

 Fruit a globose, 3-seeded berry. 



1. S. Canadensis, (L.) A shrub, thickened at the joints with glabrous 

 branches. Leaves generally bipinnate ; leaflets oblong-oval, acutely 

 serrate, acuminate, glabrous, shining. Calyx small. Corolla rotate, 

 with revolute, oval segments. Flowers in axillary cymes. Fruit glo- 

 bose, black. — White. ^ . April — May. Wet grounds. Common. 

 8—15 feet. Elder. 



Order LXVL— RUBIA'CEJE. (Peruvian-bark Family) 



Calyx superior, or sometimes nearly inferior, mostly 4 — 5- 

 toothed, occasionally obsolete. Corolla inserted in the calyx, 

 4 — 5-lobed. Stamens 4 — 5, inserted into the corolla. Ovary 

 2 — 3-celled, 1 — many ovules. Fruit various. Trees, shrubs, 

 or herbaceous plants, with opposite or verticillate, stipulate 

 leaves. [This order includes the orders Stellate^ and Cincho- 

 nacea>?\ 



ANALYSIS. 



1. Leaves in whorls 2 



Leaves opposite 3 



2. Corolla rotate, small Galium, 1 



Corolla campanulate Eulia, 2 



3. Shrubs 4 



Herbaceous plants 5 



4 Stamens 4 Cephalanthus, 5 



Stamens 5 Pinckneya, 8 



5. Stamens 5 Mitreola, 9 



Stamens 4 6 



6. Evergreen, creeping plants Mitchella, 6 



Not evergreen plants 7 



7. Calyx 2-leaved Diodia, 4 



Calyx 4-leaved or 4-parted 8 



8. Corolla rotate Polypremum, 10 



Corolla not rotate 9 



9. Fruit many-seeded Hedyotis, 1 



Fruit few-seeded Spermacoce, 3 



Sub-order L— STELLA'TEvE. 



Leaves whorled. Ovary inferior. Herbaceous plants. 



Gencs I.— GA'LIUM. L. 4—1. 

 (From gala, milk, which some species curdle.) 



Calyx with the tube ovate-globose, or oblong; limb nearly 

 wanting. Corolla rotate, 4-parted. Stamens 4. Style 2-cleft. 

 Fruit didymous. 



