222 ' CAPRIFOLIACE^. (HONEYSUCKLE FAMILY.) 



8. D IE il VILLA, Tourn. Bush-Honeyscckle. 



Calyx-tube tapering at the summit ; the lobes slender, awl-shaped, persistent. 

 Corolla fuuuel-form, 5-lobed, almost regular. Stamens 5. Pod ovoid-oblong, 

 pointed, 2-celled, 2-valved, septicidal, many-seeded. — Low upright shrubs, 

 with ovate or oblong pointed serrate leaves, and cymosely 3 - several-flowered 

 peduncles, from the upper axils or terminal. (Named in compliment to Dr. 

 Dierville, who brought it from Canada to Tournefort.) 



1. D. triflda, Moench. Leaves oblong-ovate, taper-pointed, petioled; 

 peduncles mostly 3-flowered ; pod long-beaked. — Rocks, Newf . to the moun- 

 tains of N. C, west to Minn. June - Aug. — Flowers honey-color, not showy, 

 as are the Japanese species cultivated under the name of Weigela. 



Order 52. RUBIACE^E. (Madder Family.) 



Shrubs or herbs, with opposite entire leaves connected by interposed stipules, 

 or in whorls icithout apparent stipules, the calyx coherent with the 2-'i-celled 

 9vary, the stamens as many as the lobes of the regular corolla (4-5), and 

 inserted on its tube. — Flowers perfect, but often dimorphous (as in ^Nlitcli- 

 ella and Houstonia). Fruit various. Seeds anatropous or amphitropous. 

 Embryo commonly pretty large, in copious hard albumen. — A very large 

 family, the greater part, and all its most important plants (such as the 

 Coffee and Peruvian-Bark trees), tropical. 



I. CINCHONE^. Ovules numerous in each cell ; leaves opposite. 



1. Houstonia. Corolla salver-form or fiiiinel-form, 4-lobed. Seeds rather few, thimble- 



shaped or saucer-shaped. Low herbs. 



2. Oldenlandia. Corolla wheel-shaped in our species, 4-lobed. Seeds very numerous and 



minute, angular. Low herbs. 



II. COFFEINE^. Ovules solitary in the cells ; leaves mostly opposite. 

 -<- Flowers in a close and globose long-peduncled head. Fruit dry. Shrubs. 



3. Cephalanthus. Corolla tubular ; lobes 4. Fruit inversely pyramidal, 2- 4-seeded. 



•t- -1- Flowers twin ; their ovaries united into one. Fruit a 2- eyed berry. 



4. Mitchella. Corolla funnel-form ; its lobes 4. A creeping herb. 



•1- -1- H- Flowers axillary, separate. Fruit dry when ripe. Herbs. 



5. Spermacoce. Corolla funnel-form or salver-form ; lobes 4. Fruit separating when ripe 



into 2 carpels, one or both of them opening. 



6. Diodia. Fruit separating into 2 or 3 closed and indehiscent carpels ; otherwise as n. 5. 



III. STELLATE. Ovules solitary ; leaves in whorls, without stipules. 



7 Galium. Corolla wheel-shaped, 4- (or rarely 3-) parted. CaljTC-teeth obsolete. Fi-uit 



twin, separating into 2 indehiscent 1-seeded carpels. 

 8. Sherardia. Corolla funnel-form. Calyx-lobes lanceolate. Flowers subsessile, 



involucrate. 



L HOUSTONIA, L. 



Calyx 4-lobed, persistent ; the lobes in fruit distant. Corolla salver-form or 

 funnel-form, usually much longer than the calyx-lobes, 4-lobed, the lobes val- 

 vate in the bud. Stamens 4 ; anthers linear or oblong. Style 1 ; stigmas 2. 

 Ovary 2-celled. Pod top-shaped, globular, or didymous, thin, its summit or upper 

 half free from and projecting beyond the tube of the calyx, loculicidal across 



