GENTIANE/E. XLII. Eustoma. 
oblong, l-celled, ex Sal. and 2-celled, ex Nutt. succulent ; 
with short, stipitate placentas. Style short, erect; stigma large, 
deeply 2-lobed. Seeds scrobiculate.—Annual herbs, with the 
habit of Pneumondnthe. Leaves glaucous, oblong, opposite, 
decussate, perfoliate. Corymbs few-flowered, dichotomous, 
terminal. Flowers blue. The plants have glaucous, perfoliate 
leaves,, not unlike those of Lobel’s Catchfly, the Siléne 
Arméria. 
1 E. sinENiFOLIA (Sal. par. t. 34.) stems terete; leaves 
obovate-lanceolate ; segments of calyx winged on the back. 
©. H. Native of Providence, and of North America, on the 
sandy banks of the great salt river of the Arkansas; and at 
sources of the Canadian river. Lisidnthus glaucifolius, Lam. 
dict. 660. Jacq. col. 1. p. 64. icon. rar. 1. t. 33. Nutt. in 
amer, phil. trans. vol. 5. n. s. p. 177. Corolla purple: anthers 
yellow. 
Catchfly-leaved Eustoma. Fl. July. Clt. 1804. Pl. 1-2 
foot. 
2 E. exatra‘ta (Sal. 1. c.) stem slightly tetragonal; leaves 
spatulate or oblong-lanceolate ; calycine segments winged on 
the back. (9. S. Native of St. Domingo and Vera Cruz. 
Lisiánthus exaltatus, Lam. 3. p. 662. ill. p. 478. Gentiana 
exaltàta, Lin. spec. 231. Lam. dict. 2. p. 636. Erythræ'a 
Plumiéri, H. B. et Kunth. nov. gen. amer. 3. p. 176.—Plum. 
spec. 3. Burm. amer. icon. t. 81. f. 1. Leaves 3-nerved. 
Segments of corolla crenated. Fruit full of clammy seeds. 
This species differs from the preceding, in having a more angu- 
lar stem, and a greater number of flowers; in the wings of the 
calyx being broader, and in the filaments being inserted a little 
higher up. 
Var. B, albiflora; herb more glaucous than the species : and 
the flowers white and more expanded. ©. F. Native of 
Mexico, at Papantla, on the banks of rivulets. Cham. et 
Schlecht, in Linnzea, 6. p. 387. 
Tall Eustoma. Pl. 2 to 3 feet. 
Cult. The seeds of the species of Eástoma require to be 
iiie, on a hot-bed, and otherwise treated like other tender 
annuals. 
Tribe II. 
EXACIEE (the plants contained in this section agree with 
E'racum, in having a 2-celled capsule.) Capsule 2-celled ; 
margins of valves bent into the central placenta, which is at 
length free, and bears the seeds. 
XLIII. SEB/E'A (named in memory of Alb. Seba, an apothe- 
cary of Amsterdam, author of Locupletissimi rerum naturalium 
thesauri descriptio, 4 vol. fol. Amsterdam, 1734—1765.) Solander 
mss. R. Br. prod. p. 451. E'xacum species of Lin. and others. 
Liw.svsT. Tetra-Pentándria, Monogynia. Calyx 4-5-parted ; 
segments keeled or winged on the back. Corolla 4-5-cleft, salver- 
shaped, marcescent. Stamens 4-5, exserted ; anthers dehiscing 
lengthwise: when old, recurved, with a callous apex. Stigmas 
2. Capsule 2-celled, 2-valved; valves with inflexed edges in- 
serted into the central placenta, which is at length free.— Erect 
annual glabrous herbs, with tetragonal stems and branches; 
opposite, decussate, sessile leaves; and usually terminal, corym- 
bose panicles of flowers. 
1 S. corpa‘ta (R. Br. prod. p. 452.) stem dichotomous, 
tetragonal; leaves sessile, cordate ; flowers 5-cleft in the forks, 
on short pedicels, or in corymbs ; stamens inclosed; segments 
of calyx cordate, furnished each with a keel on the back. ©.G. 
Native of the Cape of Good Hope. E’xacum cordàtum, Lin. 
syst. 155. suppl 124. Cham. et Schlecht in Linnza, 194. 
Gentiàna exacoides, Lin. spec. p. E’xacum grandiflorum, Geertn. 
fruct. 2. p. 158. t. 114.—Burm. afr. t. 74. f. 5. Corolla yellow, 
with a cylindrical tube and obovate segments. Habit of Ery- 
XLIII. Sesxa. 211 
thre’a Centaárium. In all the varieties the stamens are said to 
be inclosed in the throat of the corolla. 
Var. a, macrántha (Cham. et Schlecht in Linnea, 1. p. 191.) 
keels of the calyx, which is large, broadly winged, smooth, or 
scabrous; corollas large, an inch long: more than twice longer 
than the calyx. 
Var. 3, intermédia (Cham. et Schlecht, l. c.) keels of calyx 
with narrow, smooth, almost evanescent wings; corolla smaller, 
half an inch long, twice as long as the calyx. 
Var. y, micrantha (Cham. et Schlecht. l. c. p. 192.) keels 
of calyx winged, nerved, having the nerves ending in teeth ; 
corolla minute, 4 lines long, not quite twice the length of the 
calyx.—Plukn. alm. p. 94. t. 275. f. 4. 
Cordate-leaved Seba. Fl. July, Aug. Clt. 1815. 
to $ foot. 
2 S. sULPHU`REA (Cham. et Schlecht. in Linnea, 1. p. 192.) 
stem dichotomously and corymbosely branched, sub-tetragonal ; 
leaves sessile, broad, ovate, acute, l-nerved ; calyx nearly glo- 
bose, with acute segments, which are winged by a narrow keel 
on the back ; flowers 5-cleft; stamens exserted. (2. G. Native 
of the Cape of Good Hope, on the top of the Table Mountain. 
S. tabularis, Ecklon, mss. Leaves 3 lines long and two broad. 
Corolla sulphur coloured, with elliptic, acute segments. Calyx 
much shorter than the tube of the corolla. 
Sulphur-coloured flowered Sebæa. — Pl. 4 foot. 
3 S. cRAssULEFOLIA (Cham. et Schlecht, 1. c. p. 193.) stem 
corymbosely branched; angles winged; branches straight ; 
leaves cordate, roundish, acute, sessile, 3-5-nerved ; flowers 
quinquefid ; calyx ovoid, with acute, sharply keeled segments ; 
stamens exserted. ©.G. Native of the Cape of Good Hope, 
at Plettenbergsbay Poort. Stem naked at the base. Branches 
floriferous at top. Leaves 4-5-lines broad, and 3 lines long, 
with the margins and apexes inflexed. Flowers crowded, 
yellow. 
Crassula-leaved Sebza. Pl. 1 to 14 foot. 
4 S. carrra‘ra (Cham. et Schlecht, 1. c.) stem crowded with 
leaves at bottom, the rest naked and simple, terminated by a 
coarctate panicle; leaves sessile, ovate, attenuated at the 
base, 3-nerved; flowers quadrifid; calyx ovate, with keeled 
segments; stamens exserted. ©.G. Native of the Cape of 
Good Hope, on the top of the Table Mountain. Leaves with 
revolute edges. The superior part of the stem often furnished 
with one or two pairs of minute, stem-clasping leaves. Corolla 
yellow, much longer than the calyx, with obtuse segments. 
Capitate-flowered Seba. PI. 1 foot. 
5 S. au’rea (R. Br. prod. p. 452.) stem dichotomous, slightly 
tetragonal; leaves sessile, cordate, ovate, 3-nerved; panicle 
corymbose, terminal; flowers quadrifid: calycine segments with 
winged keels; stamens inclosed. ©.H. Native of the Cape 
of Good Hope. Gentidna afirea, Thunb. E’xacum aüreum, 
Lin. syst. 155. suppl. 123. Lam. ill. t. 80. f. 2. E'xacum séssile, 
Lin.—Plukn. phyt. t. 275. f. 3. Corolla golden yellow, with 
lanceolate, acute segments. Habit of Erythre'a Centaárium. 
Var. B; flowers pale yellow. Cham. in Linnzea, 6. p. 646. 
Golden-flowered Sebea. Fl. Ju. Aug. Cl. 1824. Pl. i 
foot. 
6 S. ArLsENs (R. Br. l. c.) stem tetragonal, dichotomously 
branched, fastigiate ; leaves cordate, decurrent, 3-nerved ; flowers 
5-cleft, terminal; calycine segments keeled on the back; sta- 
mens exserted. ©. G. Native of the Cape of Good Hope. 
E'xacum álbens, Lin. syst. 155. suppl. 123. E'xacum peduncu- 
làtum, Lin. Gentiana álbens, Thunb. Corolla whitish; tube 
longer than the calyx ; and the limb length of the tube.—Burm. 
afr. p. 207. t. 74. f. 4. 
White-flowered Sebeea. Fl. Aug. Clt. 1820. Pl. 3 foot. 
7 S. ovata (R. Br. prod. p. 452.) stem branched, dichoto- 
Ee 2 
Pl. 4 
