KUBIACE.E. (MADDER FAMILY.) 193 



9. G. asprellum, Michx. Stem weak, 2 - 4 long, diffusely branched, 

 retrorsely hispid ; leaves 6 in a whorl, lanceolate or elliptical, hispid on the 

 midrib and margins ; flowers very numerous, minute, white. Mountains of 

 North Carolina. July. 



10. G. latifolium, Michx. Stems erect, smooth ; leaves thin, 4 in a 

 whorl, ovate-lanceolate, acute, smooth, 3-iierved, dotted, minutely fringed on 

 the margins; peduncles filiform, 2 - 3 times forking. Mountains of North 

 Carolina, and northward. July. Stems 1 - H high. Leaves l'-2' long. 

 Flowers purple. 



11. G. Arkansanum, Gray. Stems low, smooth; leaves 4 in a whorl, 

 lanceolate or linear, 1' or less long, ciliate on the margins ; peduncles forking. 

 West Tennessee (Gattinyer), and westward. 



2. SPERMACOCE, L. 



Calyx 2 -4 parted, persistent. Corolla salver-shaped or funnel-shaped, 4- 

 lohed, valvate in the bud. Stamens 4, inserted on the throat of the corolla. 

 Stigma simple or 2-cleft. Fruit composed of two 1 -seeded carpels. Seeds 

 grooved on the inner face Low herbs. Leaves obliquely straight-veined, 

 their bases connected by the bristly-fringed sheathing stipules. Flowers 

 small, in axillary sessile clusters. 



* Carpels separating at the, ajiex, one of them closed by the partition, the othrr 



open. SPERMACOCE. 



1. S. glabra, Michx. Stem 4-angled, smooth, erect ; leaves lanceolate or 

 oblong, acute, roughened on the margins and veins beneath ; clusters globose, 

 dense, many-flowered ; corolla barely longer than the lanceolate calyx teeth, 

 white, woollv within ; stamens and style included; fruit obovate. Banks of 

 rivers, Florida, and westward. June. 2/ Stem l-2 high. 



2. S. tenuior, L. Stem erect, smooth, slightly angled ; leaves oblong- 

 lanceolate, acute, rough above aud on the margins ; clusters few-flowered ; 

 corolla white, hairy within, 2-3 times as long as the calyx; stamens and 

 slender style exserted ; fruit turbinate. Dry soil, Florida, Georgia, and 

 westward. July. ^ Stem 6' - 12' high. 



3. S. Portoricensis, Balbis. Stem slender, erect or prostrate, branch- 

 ing from the base, terete, smooth ; leaves lanceolate, rough above, remote ; 

 clusters small, mostly few-flowered ; flowers minute, the smooth white corolla 

 barely longer than the subulate teeth of the calyx ; stamens and style in- 

 cluded ; fruit ovoid, hairy. South Florida, in dry soil. (T) Stem 3' - 12' 

 long. 



* * Carpels both opening on the inner face. BORRERIA. 



4. S. parviflora, Gray. Annual ; stem erect, slender, simple or branched 

 above, 4-angled, smooth ; leaves remote, lanceolate, mostly obtuse, narrowed 

 at the base, the upper surface and margins rough, the lateral veins obscure ; 

 clusters dense, globose, axillary and terminal ; calyx teeth 4, subulate, longer 

 than the ini:iu:e (white) corolla; fruit ovoid, hairy. Waste places, Florida. 

 lui.e - August. riant 6'- 18' high, pale green. Leaves 1' long. 



13 



