RUBIACEAE (MADDER FAMILY) 



747 



SUBFAMILY II. CINCHONOf DEAE. Ovules numerous in each cell ; leaves 



opposite. 



Seeds rather few, thimble-shaped 



8. Houstonia. Corolla salver-form or funnel-form, 4-lobed. 



or saucer-shaped. Low herbs. 



9. Oldenlandia. Corolla wheel-shaped in our species, 4-lobed. 



angular. Low herbs. 



Seeds very numerous and minute, 



1. SHERARDIA [Dill.] L. FIELD MADDER 



Calyx-lobes lanceolate, persistent. Corolla funnel-form, the limb 4-6-lobed. 

 Style filiform, 2-cleft ; stigmas capitate. Fruit dry, twin, of 2 indehiscent 

 1-seeded carpels. A slender procumbent herb, with square stems, lanceolate 

 pungent leaves in whorls of 4-(5, and small blue or pinkish flowers surrounded 

 by a gamophyllous involucre. (Named for Dr. William Sherard, patron of 

 Dillenius.) 



1. S. ARVENSIS L. The only species. Waste places and fields, N. S. to Ont., 

 O., and N. J., local. (Nat. from Eu.) 



2. ASPERULA L. 



Similar to Galium, but with tubular or tubular-campanulate corolla. An 

 Old World genus. (Name from asper, rough, in reference to some scabrous 

 species.) 



1. A. CALICHES Bieb. Smooth and glaucous, 3-8 dm. high; leaves 5-10 in 

 a whorl, linear, subulate-tipped ; flowers white, short-pediceled in cyrnules form- 

 ing a handsome panicle. Fields, local, Ct. to Mich. (Adv. from Eu.) 



3. GALIUM L. BEDSTRAW. CLEAVERS 



Calyx-teeth obsolete. Corolla wheel-shaped, valvate in the bud. Stamens 4, 

 rarely 3, short. Styles 2. Fruit dry or fleshy, globular, twin, separating when 

 ripe into the 2 seed-like indehiscent 1-seeded carpels. Slender herbs, with 

 small cymose flowers (produced in summer), square stems, and whorled leaves, 

 the roots often containing a red coloring matter. (Name from 7<iXa, milk, which 

 some species are used to curdle.) 



a. Fruit dry b. 

 b. Annuals. 



Fruit bristly. 



Flowers sessile or subsessile ; leaves 4-7 mm. long . . . 1. G. nirgatum. 

 Ffowers on long ascending axillary peduncles . . . 2. G. Aparine. 



Fruit smooth or merely granulate-roughened. 



Flowers 1-few on axillary peduncles ; fruit 8-4 mm. thick . 8. G. trioorne. 

 Flowers tiny, in terminal small cymes ; fruit barely 1 mm. thick 4. G. parisienst. 

 b. Perennials o. 

 c. Flowers yellow. 



Panicle rather dense, its lower branches much exceeding the 



internodes .......... 5. ff. verum. 



Panicle loose, slender, interrupted, its lower branches shorter 



than the internodes ........ 6. G. WirtgenM. 



c. Flowers white, greenish-white, or purplish d. 

 d. Erect plants, neither the stems nor leaves retrorsely scabrous . 

 . Leaves mostly in 4's /. 

 /. Peduncles loosely 8-several-flowered ; flowers dull purple 



to greenish-white g. 

 ff. Fruit unciniite-hispid. 



Mature flowers and fruits on distinct pedicels. 



Leaves firm and dull, the whorls uniform ... 7. G.pilosum. 

 Leaves fllmy and lucid ; the upper whorl largest . 8. G. Tcamtschaticwn. 

 Flowers and fruits inostlv sessile or subsessile along 



the loosely divergent branches of the peduncles. 

 Leaves oval or oblong, obtuse; flowers commonly 



pubescent ........ 9. G. circaezant. 



Leaves lance-acuminate ; flowers glabrous . . 10. (! . lanceolatum. 

 ff. Fruit smooth. 



Leaves ovate-lanceolate, 8-nerved ..... 11. G. latifolium. 



Leaves linear or lanceolate, 1 -nerved . . . . 12. G. arkanvanum. 







