620 
400. S. tetragòna, hort. berol. Leaves pilose above? Flowers 
pale red. 
Suffrutescent Button-weed. Fl. June, Aug. Clt. 1824. Pl. 
4 foot. 
9 S. uinza‘ris (H. B. et Kunth, nov. gen. amer. 3. p. 343.) 
stem suffruticose, obsoletely tetragonal, clothed with hairy down; 
leaves linear, scabrous above and on the margins, hairy beneath; 
stipulas hairy, ciliated with bristles; whorles many-flowered, 
sessile, axillary ; corollas glabrous; stigma rather capitate, ex- 
serted ; capsule oblong, hispid at top; teeth of calyx 4, ovate- 
lanceolate. h. S. Native on the banks of the Orinoco. Corollas 
white. Bigelowia linearis, Spreng. syst. 1. p. 405. 
Linear-leaved Button-weed. Shrub 1 foot. ? 
* * Species natives of Africa. 
10 S. parmeto‘rum (D.C. prod. 4. p. 553.) plant herbaceous, 
ascending, branched ; stem tetragonal, hairy; branchlets com- 
pressed ; leaves oval-lanceolate, scabrous above and lined, hairy 
beneath and nerved; stipulas villous, with the bristles shorter 
than the sheath; flowers 5-6 together on both sides, sessile, 
axillary, verticillate; fruit rather hairy, obovate; teeth of 
calyx, 4, short, subulate, at length deciduous.—Native every 
where about the Gambia, at the roots of palm-trees, in humid 
places, where it was collected by Leprieur and Perrottet. Al- 
lied to S. tendior. Perhaps Diddia scabra, Schum. pl. guin. 
p. 76.2? 
Palm-tree Button-weed. Pl. 1 foot. 
11 S.? pito'sa (D. C. prod. 4. p. 553.) stem herbaceous, 
tetragonal, with blunt, pilose angles; leaves ovate, acute, sca- 
brous on both surfaces; bristles of stipulas distant, longer than 
the sheaths ; whorles sessile, many-flowered ; fruit ovate, 
crowned by the 4 reflexed, acute lobes of the calyx.—Native 
of Guinea. Diddia pilosa, Schum. pl. guin. p. 76. 
Pilose Button-weed. P]. 1 foot. 
12 S. PHYLLOcE'PHALA (D. C. 1. c.) plant erect, glabrous, 
sparingly branched ; stems tetragonal; leaves linear, 1-nerved : 
floral ones dilated at the base; bristles of stipulas 3-5 on each 
side, longer than the sheath; heads of flowers axillary, verticillate, 
very few, and a large terminal one, the latter surrounded by long, 
squarrose leaves; fruit solitary in the axils of the floral leaves, 
crowded from the floral leaves being clustered ; seeds large, shin- 
ing. ©.S. Native of the west coast of Africa, at Kouma and 
Walo, where it was collected by Perrottet and Leprieur. Seeds 
2 lines long, almost like those of Psyllium. 
Leaf-headed Button-weed. Pl. 1 foot. 
13 S. sracuy'pea (D.C. prod. 4. p. 554.) plant erect, nearly 
simple, villous; stem tetragonal; branchlets compressed ; leaves 
linear, acute, floral ones dilated at the base ; bristles of stipulas 
5-7, longer than the sheath, which is velvety ; heads of flowers 
verticillate, numerous, surrounded by 6-8 aggregate, squarrose 
leaves; flowers solitary in the axils of the leaves, and aggre- 
gate only from the leaves being crowded ; lubes of calyx linear- 
subulate, nearly the length of the fruit; seeds large, shining. 
©. S. Native of the west coast of Africa, among stones, at 
Bakel, where it was collected by Leprieur. Plant about a foot 
high. Leaves 3 inches long, and nearly 4 lines broad. Bristles 
of stipulas blackish. Seed 2 or 24 lines long, larger than any 
other of the genus. 
Stachys-like Button-weed. PI. 1 foot. 
14 S. caLeo'Psinis (D. C. prod. 4. p. 554.) erect, branched; 
stem tetragonal, hairy; leaves lanceolate-linear, rather scabrous 
on both surfaces ; bristles of stipulas longer than the sheath, 
which is velvety; flowers axillary, few, sub-verticillate; fruit 
large, velvety, longer than the subulate, calycine lobes. ©. S. 
Native of Senegambia, at Dagana, in sandy places. Allied to 
S. Ruéllie, but very distinct. Herb about a foot high. Leaves 
RUBIACEA. CLXXXVI. Spermacoce. 
15-16 lines long, and 3 broad, pale beneath. Stipulas yellowish, 
Fruit larger than in any other species of the genus, almost like 
that of a species of Diddia, but is membranous and dehiscent. 
Seeds large. 
Galeopsis-like Button-weed. PI. 1 foot. 
15 S. Rur’tum (D. C. |. c.) erect, branched ; stem tetra- 
gonal, hispid; leaves lanceolate-linear, acuminated, clothed with 
rough down on both surfaces ; heads many, verticillate, axillary; 
bristles of stipulas many, 3 times longer than the sheath, which 
is downy; valves of fruit at length opening widely at the apex; 
lobes of calyx subulate, rather longer than the fruit. ©, S. 
Native of Equinoctial Africa, in sandy places at Bakel, where it 
was collected by Leprieur. Stem a foot high. Leaves 3 inches 
long, and 5-6 lines broad. Mature fruit nearly as in the genus 
Ruélie. Seed a line and a half long. 
Ruellia-like Button-weed. PI. 1 foot. 
16 S. cuzroce’puata (D. C. 1. c.) stem erect, simple, terete 
at the base and glabrous, and tetragonal at the apex, with the 
angles scabrous ; leaves linear-elongated, acuminated, glabrous; 
bristles of stipulas 5-7, subulate, longer than the sheath, which 
is villous; heads verticillate, surrounded by many leaves, and 
the many bristles of the stipulas; fruit pale, membranous, 
downy at the apex; lobes of calyx subulate, shorter than the 
fruit. ©. S. Native of Equinoctial Africa, in Gala, among 
rocks at Bakel, where it was collected by Leprieur. Plant 13 
foot high. Leaves 3 inches long, and 3 lines broad. Bristles 
of stipulas rufous. Capsules whitish. Seeds a line long. 
Bristly-headed Button-weed. PI. 14 foot. 
** * Species natives of the Mauritius and Madagascar. 
17 S. FLAGELLIFÓRMIS (Poir. dict. 7. p. 314.) stem herba- 
ceous, terete, glabrous, simple, erectish ; leaves glabrous, ob- 
long-lanceolate, acute, revolute on the margins at the base, and 
therefore petiole-formed ; stipulas broad-cupshaped, having the 
bristles rather shorter than the sheath; flowers axillary, few, 
sessile, verticillate ; capsule ovate, puberulous, crowned by the 
4 slender acute teeth of the calyx. ©. S. Native of the 
Mauritius and Bourbon. S. flagellàris, Willd. in Ræm. et 
Schultes, syst. 3. p. 532. ex Cham. et Schlecht. in Linnæa. K 
p- 357. Hedyòtis verticillàta, Lam. ill. no. 1423. exclusive 0 
the synonymes of Desf. 
Whip-formed Button-weed. Pl. 1 foot. 
12 S. muricuLa`ra (D. C. prod. 4. p. 554.) glabrous; stem 
herbaceous, tetragonal, having the angles just under the nod 
rough from small tubercles ; leaves elliptic-lanceolate, acum!- 
nated at both ends, scabrous above; bristles of stipulas longer 
than the sheath, which is very short; flowers disposed in sessile, 
glomerate whorles in the axils of the leaves; fruit ovate, domy 
crowned by the 2-4 very short, acute, calycine teeth, but 1s 4 
length nearly naked.—Native of the Mauritius and Bourbon. 
Allied to S. tendior ; but the angles of the stem are not downy; 
but scabrous from tubercles. 
Muriculated-stemmed Button-weed. Pl. 1 to 14 foot. 
19 S. serpyiurrézia (Willd. in Roem. et Schultes, syst. 3. E 
532.) plant diffuse, scabrous; leaves elliptic, with revolute mar 
gins; whorles few-flowered.—Native of Madagascar. A true 
species of Spermacòce ex Cham. et Schlecht. in Lianzea. 3. P 
357. but the rest is unknown. 
Wild-thyme-leaved Button-weed. PI. 
** © *® Species natives of India. 
20 S. srricra (Lin. fil. suppl. p. 120.) stem te 
straight, erect, scabrous at the angles ; leaves linear-lanceo : 5 
lined, scabrous; stipulas ciliately fringed; whorles of flowe : 
axillary, remote, globose ; fruit obovate-globose, rather “cal 
branous at the base, and hispid at the apex, crowned by the 
