222 CAPRIFOLIACE^. (HONEYSUCKLE FAMILY.) 



8. DIE R, VILLA, Tourn. BUSH-HONEYSDCKLE. 



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

 Corolla fnuuel-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. trifida, 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. RUBIACEvE. (MADDER FAMILY.) 



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

 or in whorls luithout apparent stipules, the calyx coherent with the 2-4-celled 

 ovary, the stamens as many as the hies of the regular corolla (4-5), and 

 inserted on its tube. Flowers perfect, but often dimorphous (as in Miteh- 

 ella and Iloustonia). 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./E. Ovules numerous in each cell ; leaves opposite. 



1. Houstoiiia. Corolla salver-form or funnel-form, 4-lobed. Seeds rather few, thimblo- 



slinped or saucer-shaped. Low herbs. 



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



minute, angular. Low herbs. 



II. COFFEINEvE. 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- (- Flowers twin ; their ovaries united into one. Fruit a 2- eyed berry. 



4. IMitchella. Corolla funnel-form ; its lubes 4. A creeping herb. 



*-*-!- 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. 

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



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



7. Galium. Corolla wheel-shaped, 4- (or rarely 3-) parted. Calyx-teeth obsolete. Fruit 



twin, separating into 2 indehiscent 1-seecled carpels. 



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



in vol iterate. 



1. 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 



