210 



GENTIANE^E. XXXIX. LISIANTHUS. XL. IRLBACHIA. XLI. SYMBOLANTHUS. XLII. EUSTOMA. 



acute, petiolate, with 2 oblique nerves ; peduncles solitary or 

 twin, long, bracteolate under the flower ; calyx turbinate ; co- 

 rolla with a short tube, a ventricose sub-campanulate, inflexed 

 limb ; and ovate, obtuse, rather irregular segments. 0. S. 

 Native of South America. Leaves 12-20 lines long, and 5-6 

 broad. Bracteas minute. Corolla yellow. ? 



Campanulale-fiowered Lisianthus. PI. 1 to 1} foot. 



31 L. NIGRE'SCENS (Cham, et Schlecht, in Linnsea, 6. p. 388.) 

 stem and branches terete ; leaves of the sterile branches half 

 stem-clasping, ovate, with rounded, stem-clasping auricles, 

 which are lanceolate at the base, acuminated, pale green above, 

 but paler beneath ; panicle large, loose-flowered ; calycine seg- 

 ments narrow-lanceolate, acuminated ; corolla almost funnel- 

 shaped ; with elliptic-acuminated segments. Q. G. Native 

 of Mexico, in woods, at Papantla. Leaves 6 inches long, and 2 

 inches broad. Corolla blackish in the dried state, but probably 

 greenish yellow in the recent state. Capsule elliptic. 



Blackish-Qowered Lisianthus. PI. 1 to 2 feet. 



32 L. SAPONARIOIDES (Cham, et Schlecht. 1. c. p. 389.) stem 

 branched, nearly terete at bottom, but obsoletely tetragonal at 

 top ; leaves nearly sessile, ovate-lanceolate, acuminated, with 

 rather scabrous edges ; inflorescence a compound cyme. 1 G. 

 Native of Mexico, at Papantla, on the edges of woods. Leaves 

 5 inches long. Calycine segments lanceolate, acuminated. Co- 

 rolla white, salver-shaped ; with ovate, acuminated segments. 

 Capsule elliptic or ovate. 



Saponaria-lihe Lisianthus. PI. 1 to 2 feet. ? 



j- Species not sufficiently known ; and probably not belonging to 



the genus. 



33 L. CARINA'TUS (Desr. in Lam. diet. 3. p. 659. ill. t. 107. f. 

 3.) glabrous ; stem branched ; branches tetragonal ; leaves 

 roundish-ovate, sessile, 3-nerved ; calyx prismatic, having the 

 segments keeled upwards ; corolla with a slender tube, and 

 ovate, spreading segments. 1? . S. Native of Madagascar. 

 Leaves sub-connate. Flowers erect, pedicellate, terminal and 

 axillary. Corolla 3 times longer than the calyx. Capsule 

 ovate-oblong. 



ATee/erf-calyxed Lisianthus. Shrub. 



34 L. TRINE'RVIS (Desr. in Lam. diet. 3. p. 659. ill. p. 476.) 

 downy ; stem sub-tetragonal ; leaves ovate, mucronate, on short 

 petioles ; flowers in loose terminal, trichotomous panicles, pedi- 

 cellate ; calyx deeply divided, with keeled segments ; limb of 

 corolla parted nearly to the base into narrow segments. I/ . S. 

 Native of Madagascar. Leaves beset with short hairs on both 

 surfaces ; bracteas short, lanceolate, acute. Capsule ovate. 



Three-nerved-lenved Lisianthus. PL 1 \ foot. 



35 L. TUBIFLORUS (Pet. Th. in Willd. mss. ex Roem. et 

 Schultes, syst. 4. p. 788.) glabrous ; stem terete ; leaves ovate, 

 acuminated, petiolate, 3-nerved ; umbels terminal, few-flowered ; 

 calyx ventricose, contracted at top ; tube of corolla 6 inches 

 long ; limb wide : with ovate, acuminated segments. \i . 1 S. 

 Native of Madagascar. Superior leaves lanceolate, 4 inches 

 long, longer than the internodes. 



Tube-flowered Lisianthus. Shrub. ? 



Cult. Most of the species of Lisianthus are very handsome 

 when in blossom. A mixture of loam, sand, and peat is a good 

 soil for them ; and cuttings of the shrubby and perennial species 

 strike root readily in sand, under a hand-glass. The annual 

 kinds require the same as that recommended for E'xacum, p. 213. 



XL. IRLBA'CHI A (named by Martius, in honour of Gabriel, 

 Count de Bray, of the dynasty of Irlbach, ambassador from the 

 King of Bavaria to the Court of Spain.) Mart. nov. gen. bras. 

 2. p. 101. 



LIN. SYST. Pentdndria, Monogynia. Calyx campanulate, 5~ 



cleft ; segments erect, with membranous margins. Corolla 

 funnel-shaped, equal, deciduous ; limb 5-cleft ; throat naked. 

 Anthers revolute when dry. Stigma bifid ; segments cylindri- 

 cal, not bi-lamellate. Capsule 2-celled, 2-valved, many-seeded ; 

 margins of valves placentiferous. bent inwards. An erect, gla- 

 brous herb. Stems tetragonal, fistular. Leaves opposite, de- 

 cussate, petiolate, triple or quintuple-nerved. Flowers alter- 

 nate, disposed in dichotomous panicles. This genus differs 

 from Lisianthus in the regular corolla, and structure of the 

 stigma. 



1 I. E'LEGANS (Mart. 1. c. p. 102. t. 179.) leaves lanceolate, 

 acuminated; rachis of panicle geniculately bent. Q. S. Na- 

 tive of Brazil, in the province of Rio Negro, near Ega, in 

 moist, sylvan meadows. Corolla blue, a nail in length. Ra- 

 cemes long, twin, with a flower in the fork between them. 



Elegant Irlbachia. PI. 1| to 2 feet. 



Cult. For culture and propagation see E'xacum, p. 213. 



XLI. SYMBOLA'NTHUS(from (rvf*(3o\oi>,symbolon,a.ring; 

 in reference to the ring at the base of the filaments.) Lisian- 

 thus species, Ruiz, et Pav. and H. B. et Kunth. 



LIN. SYST. Pentdndria, Monogynia. Calyx 5-parted, pen- 

 tagonal ; segments with membranous margins. Corolla salver- 

 shaped, with a cylindrical tube, 3 times longer than the calyx ; 

 and a 5-parted limb ; segments with crenulately fringed edges. 

 Stamens inserted in the tube, hardly exserted ; anthers sagittate, 

 at length convolute, having a short, ring-formed, crenulated, 

 membrane at the base of the filaments. Ovarium ovate, com- 

 pressed, 1-celled, 2-valved ; placentas 2, parietal, bilamellate, 

 bearing seeds on the back. Stigma 2-lobed ; lobes linear- 

 oblong, flat, blunt. Capsule ovate. Glabrous, branched shrubs ; 

 branches tetragonal. Leaves opposite, decussate, on short pe- 

 tioles, with a prominent middle nerve, obsoletely veined ; pe- 

 tioles round at the base. Flowers axillary, solitary, or 2-3 

 terminal, rose-coloured. 



1 S. KU'NTHII ; leaves oblong, acute ; flowers pedicellate, 

 axillary ones solitary, and terminal ones 2-3 together ; corolla 

 salver-shaped, with fringed segments. f? . S. Native of New 

 Granada, on mountains between Honda and Mariquita. Lisian- 

 thus anomalus, H. B. et Kunth, nov. gen. amer. 3. p. 18-1. 

 Branches sub-dichotomous. Leaves 2| inches long. Flowers 

 size of the following species. Bracteas oblong, sub-spatha- 

 ceous. 



Kunth's Symbolanthus. Shrub 5 to 6 feet. 



2 S. PAVONII ; leaves ovate-lanceolate ; flowers pedicellate, 

 axillary, solitary ; calyx pentagonal ; corolla sub-ringent. Ij . 

 S. Native of Peru, on the mountains. Lisianthus calyg6nus, 

 Ruiz, et Pav. fl. per. 2. t. 126. Leaves 2-3 inches long. Pedi- 

 cels curved, furnished with 3 ovate, concave, acuminated, brac- 

 teas each. The 3 outer segments of the calyx are lanceolate, 

 and 2 inner, sub-sagittate, all with membranous, fringed edges. 

 Corolla rub-ringent, rose-coloured, large, with acuminated, re- 

 flexed segments. 



Pavon's Symbolanthus. Shrub 5 to 6 feet. 



Cult. For culture and propagation see Tdchia, p. 197. 



XLII. EU'STOMA (from i>oro/>e, a beautiful mouth; in 

 reference to the fair corollas). Sal. par. lond. t. 34. Lisianthus 

 species of authors. 



LIN. SYST, Pentdndria, Monogynia. Calyx deeply 5-cleft, 

 having the backs of the segments more or less winged. Corolla 

 with a funnel-shaped tube, which is contracted a little at the 

 apex ; and a deeply 5-cleft limb, which is longer than the tube, 

 and is variegated below the middle above. Stamens 5, inserted 

 near the middle of the tube, and a little longer than it ; filaments 

 erect, linear-lanceolate ; anthers rather sagittate. Ovarium 



