RUBIACEZH. CLXXXVI. SPERMACOCE. 
ureeolate, sinuately-quadrifid. h. S. Native near Santa Fe 
de Bogota. Corolla, genitals, and fruit unknown. 
Trailing Button-weed. Shrub procumbent. 
53 S.? eriéctapa (D.C. prod. 4. p. 557.) plant suffruticose, 
ascending ; branches rather angular, clothed with hairy tomen- 
tum; leaves oblong, acuminated, very scabrous on both surfaces, 
almost veinless, with serrately scabrous edges, and sometimes 
mucronate at the apex ; bristles of stipulas glabrous, length of 
sheath, which is villous; heads of flowers terminal, girded by 4 
leaves ; teeth of calyx 4, equal ; stamens exserted. h. S. Na- 
tive of Peru. ; S. seabérrima, Bartl. in herb. Heenke, but not of 
Blume. Fruit unknown, and therefore the genus is doubtful. 
The habit is that of Borréria. 
_ Var. B, linearifolia (D. C. prod. 4. p. 557.) leaves linear, di - 
tinctly mucronate. .S. Native of Peru. 
Woolly-branched Button-weed. Shrub ascending. 
*#E** Species natives of Guiana. 
54 S.? sexancura‘ris (Aubl. guian. 1. p. 61. t. 22. f. 8.) 
plant glabrous, prostrate ; stem flexuous, prostrate, hexagonal ; 
leaves ovate, acute, petiolate ; heads of flowers terminal ; anthers 
in the throat.— Native of Guiana, on the banks of rivers. S. 
hexagona, Willd. spec. 1. p. 569. Flowers small, blue. Perhaps 
a species of Borrèria nearly allied to B. alata. 
Six-angled-stemmed Button-weed. Pl. prostrate. 
i 55 S.? prosrra’ra (Aubl. guian 1. p. 58. t. 20. f. 3.) gla: 
Tous; stem herbaceous, prostrate, oppositely branched, tetra- 
gonal ; leaves almost sessile, elliptic, acute, smooth; flowers 
verticillate.—- Native of Guiana, on the banks of rivers. Flowers 
small. Leaves pale green. 
Prostrate Button-weed. Pl. prostrate. 
= 5.7 Raprcans (Aubl. guian. 1. p. 58. t. 20. f. 4.) gla- 
eio stem herbaceous, alternately branched, prostrate, radi- 
A ; eaves almost sessile, lanceolate, acute; flowers verticil- 
Ft Y. B. Native of Guiana, on the banks of the river 
rapu. The rest unknown. 
Rooting Button-weed. Fl. July. Cit. 1803. Pl. creeping. 
ri 3.2 CaruLr’scens (Aubl. guian. 1. p. 57. t. 19. f. 2.) 
hei simple, straight, tetragonal; leaves ovate, acute, rather 
bh smooth; bristles of stipulas about equal in length to the 
eed flowers verticillate ; stamens exserted.—Native of 
Š ulana and Cayenne, on the edges of fields. Vahl. eclog. 1. p. 
. Corollas blue. Fruit unknown. 
Bluish-flowered Button-weed. Pl. 1 to 2 feet. 
$ 58 S. LatiròLa (Aubl. guian. 1. p. 56. t. 19. f. 1.) glabrous; 
em, erect, herbaceous, tetragonal ; leaves ovate, acuminated, 
Salus rough ; bristles of stipulas hispid, a little longer than 
ae eath ; flowers axillary, verticillate ; limb of calyx 4-tooth- 
s rather villous, as well as the capsules, which are ovate.— 
A = of Guiana and Cayenne by way sides. Lam. ill. t. 62. 
KA Probably a species of Borrèria or Mitracárpum. Flowers 
Broad-leaved Button-weed. Fl. July. Clt. 1803. PI. 2 to 
5 feet. 
+. é : i 
**** Species natives of Mexico. 
4 59 5. POLYCE'PHALA (Bartl. in herb. Henke, ex D. C. prod. 
Gey” stem herbaceous, erect, branched, quadrangular, vil- 
fries’ ee ovate-lanceolate, acuminated, pilose on both sur- 
Hie ined with veins beneath; bristles of stipulas longer than 
gird nah hairy ; heads of flowers terminal, nearly globose, 
3 ed by 4-leaved involucra; teeth of calyx subulate, nearly 
qual ; stamens exserted.—Native of Mexico. Perhaps a species 
of Borréria, 
Many-headed Button-weed. PI. 2 to 3 feet. 
S.? Ecutolpes (H. B. et Kunth, nov. gen. amer. 3, p. 
CLXXXVII. Hexasrpatum. 623 
344.) stem herbaceous, tetragonal, erect, hispid; leaves lanceo- 
Jate, acuminated, petiolate, hispid on both surfaces ; stipulas his- 
pid, ciliated by bristles ; whorles of flowers nearly globose, axil- 
lary and terminal. 2%.S. Native of Mexico, near Campeche. 
There is a variety of this with glabrous stems, and narrower less 
hispid leaves. 
Buglos-like Button-weed. PI. 
61 S.? piversizoxia (H. B.et Kunth, nov. gen. amer. 3. p. 341.) 
plant herbaceous, erect, with tetragonal branches, which are sca- 
brous from retrograde bristles ; leaves linear, with remotely sca- 
brously serrulated margins: the lower ones minute and oblong- 
elliptic ; stipulas smoothish, fringed by bristles; heads of flowers 
terminal; calyx 2-4-toothed ; capsules hispid. ©. F. Native of 
Mexico. Knéxia simplex, Willd. in Roem. et Schultes, syst. 3. 
p. 582. Perhaps a species of Borreria. Flowers white. 
Diverse-leaved Button-weed. PI. 
62 S.? recrina‘ra (Nees, hor. berl. p. 50.) plant glabrous, 
ascending, herbaceous ; leaves lanceolate, acute, smooth, vein- 
less; stipulas downy, furnished with 5 bristles each ; heads ter- 
minal, dense, hemispherical, supported by 2 leaves; calyx and 
fruit glabrous. %. S. Native of Mexico. Fruit unknown. 
Reclinate Button-weed. Pl]. ascending. 
#ERREE* Species natives of North America. 
63 S.? vasia'‘ntua (Rafin. fi. lud. p. 76.) stem weak ; 
branches diffuse ; leaves sessile, oblong, acute, nerved : nerves 
scabrous ; flowers verticillate ; corolla woolly inside.—Native of 
Louisiana. 
Woolly-flowered Button-weed. Pl). diffuse. 
64 S.? era`sra (Michx. fl. bor. amer. 1. p. 82.) plant gla- 
brous, procumbent ; leaves ovate-lanceolate; whorles many- 
flowered. ©. H. Native of North America, on the banks of 
the Ohio and Mississippi. Diddia glabra, Pers. ench. 1. p. 124. 
Flowers white, longer than those of S. tendior. Fruit un- 
known. 
Glabrous Button-weed. 
cumbent. 
65 S.? rvvotucra‘ra (Pursh, fl. amer. sept. 1. p. 105.) plant 
very hispid, herbaceous, erect; stem alternately branched ; 
leaves ovate-lanceolate, acuminated, hairy on both surfaces ; sti- 
pulas of many bristles ; heads terminal, involucrated ; tube of 
corolla very long; stamens exserted.—Native of Carolina. 
Flowers white. Leaves rather broad. According to Sprengel 
this is a variety of Crisca rdbra. Fruit unknown. 
Involucrated-flowered Button-weed. Pl. 1 foot. 
Cult. See Borréria, p. 618. for culture and propagation. 
Fl. July, Aug. Clt. 1823. Pl. pro- 
CLXXXVII. HEXASE’PALUM (from &, hex, six, and oera- 
Noy, sepalon, an alteration of werador, a sepal; in reference to the 
limb of the calyx being 6-parted, indicating its being composed 
of six sepals). Bartl. in herb. Hænke, ex D. C. prod. 4. p. 561. 
Lin. syst. Tetrándria, Monogy'nia. Calyx with an oblong 
obpyramidal tube, and a 6-parted limb ; lobes narrow, nearly 
equal, acute, permanent. Corolla campanulately funnel-shaped, 
with an obconical tube, and 4 lanceolate acute lobes, which are 
valvate in estivation. Stamens 4, shorter than the lobes of the 
corolla. Fruit oblong, dry, ribbed, divisible into 2 parts at the 
dissepiments : the dissepiment being double, both the parts of the 
fruit or nuts are closed, and 1-seeded.—A small ascending much 
branched glabrous shrub, with diffuse flexuous compressed 
branches. Leaves opposite, long-linear, acute, with the margins 
hardly scabrous. Stipulas sheathing, furnished with many bris- 
tles, which are equal in length to the sheath, intermixed with very 
short ciliz. Flowers axillary, solitary, sessile, larger than in 
any other genus belonging to the tribe Spermacocee. 
1 H. ancusrirdtium (Bartl. l.c.) h. S. Native of Mexico, 
