234 =F LXX. RUBIACEEZ (HIERN). [ Spermacoce. 
Corolla-tube short, not exceeding the calyx-teeth. 
Margins of the leaves not whitish, more or less 
scabrous. 
Leaves ovate or ovate-lanceolate. Flowers very 
small. 2... 1. ee ee ee C5. SP pilosa. 
Leaves lanceolate or elliptical. Flowers } in. 
long . . . 6. 8. senensis. 
Leaves linear or nearly so. 
Capsule small, not more than 4 in. long. 
Branches glabrous or nearly so. 
Calyx-teeth sublinear. Capsule glabrous 
or puberulous . ....... 
Calyx-teeth linear-spathulate or (in the 
variety) subulate. Capsule pubescent 8. S. hebecarpa. 
Capsule about } in. long. Branches pubes- 
cent or hirsute-hispid. 
Sete of the stipules as long as the sheath . 9. S. leucadea. 
Set of the stipules exceeding the sheath . 10. S. stachydea? 
Margins of the leaves whitish, not scabrous . . 11. S. radiata. 
Calyx-teeth 2 as long as the ovary, 2 others slender or 
very small or obsolete, 
Corolla-tube very short. Nearly glabrous . » 
Corolla-tube equalling the longer pair of calyx-teeth. 
Hispid-hirsute . se ee we ee 
Bracteoles numerous, conspicuous. Plant not very slender. 
Stem and branches hispid. Corolla-tube exceeding the 
calyx-teeth 2. 2. 1. 1. 1 1 ee ew ew ee 
Stem and branches glabrous. Corolla-tube about as 
long as the calyx-teeth. 
Leaves somewhat hispid beneath . 
7. &. stricta. 
12. S. ramisparsa. 
13. S. Ruellie. 
14, S, dibrachiata. 
. ew ew es 15, 8. Kotschyana. 
Leaves glabrous bone ee ee ww ee 16, 8, compacta. 
Leaves at the base of the flower-heads reflexed or obsolete. 
Undershrub . 2... we we ee ee 17. 8. globosa. 
1. S. tenuissima, Schweinf. mss. in herb. sub Borreria. A very 
slender glabrous annual, branched above the base. Branches smooth, 
Leaves narrowly linear, acute, sessile, rigid, sparingly scabrous, 3-1 
long ; stipules with 1-4 short sete about equalling the sheath. Flowers 
tetramerous, a few together, in small sessile heads terminal and in the 
upper axils, mixed with small slender bracteoles ; heads usually based 
by 2 spreading decussating pairs of leaves. Calyx-limb ciliate obscurely- 
toothed ; teeth subulate, all short or sometimes 1-2 prolonged. Corolla 
pale purplish ; tube purplish, slender, exceeding the setz of the stipules. 
Capsule puberulous at the apex, small, splitting down from the ape*- 
Wile Land. Djurland, Schweinfurth! 
Habit of slender states of Octodon filifolium, Schum. et Thonn., but calyx-tecth 
different. 
2. S. filiformis, Hiern. A very slender unbranched erect annual, 
ranging up to 2 feet high, more or less hirsute, Stem subterete belo: 
marked with narrow raised lines, compressed above. Leaves line®® 
acute, wedge-shaped at the sessile base, 4-14 in. long; stipules wit 
cup-shaped hirsute sheath and 2-5 sete equalling or rather longet than 
it. Flowers tetramerous, white, delicate, several together, verticillate, 
forming small heads in the upper axils and terminal, usually based DY 
