GENTIANE.E. XLII. EUSTOMA. XLIII. SEB^A. 



211 



oblong, 1-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 Pneumonanthe. 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 Silene 

 Armeria. 



\ E. SILENIFOLIA (Sal. par. t. 34.) stems terete ; leaves 

 obovate-lanceolate ; segments of calyx winged on the back. 

 0. 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. Lisianthus glaucifolius, Lam. 

 diet. 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-leated Eustoma. Fl. July. Clt. 1804. PL 1-2 

 foot. 



2 E. EXALTA'TA (Sal. 1. c.) stem slightly tetragonal; leaves 

 spatulate or oblong-lanceolate ; calycine segments winged on 

 the back. G- S. Native of St. Domingo and Vera Cruz. 

 Lisianthus exaltatus. Lam. 3. p. 662. ill. p. 478. Gentiana 

 exaltata, Lin. spec. 231. Lam. diet. 2. p. 636. Erythrae'a 

 Pluraieri, H. B. et Kunth. nov. gen. amer. 3. p. 176. Plum. 

 spec. 3. Burm. amer. icon. t. 81. f. 1. Leaves S-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. 



/'err. /3, albiftora; herb more glaucous than the species : and 

 the flowers white and more expanded. Q. F. Native of 

 Mexico, at Panantla, on the banks of rivulets. Cham, et 

 Schlecht, in Linnaea, 6. p. 387. 



Tall Eustoma. PL 2 to 3 feet. 



Cult. The seeds of the species of Eustoma require to be 

 reared on a hot-bed, and otherwise treated like other tender 

 annuals. 



Tribe II. 



EXACIE'JE (the plants contained in this section agree with 

 E zacum, 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. 



Lis. SYST. Tetra-Pent6ndria, Monogynia. Calyx 4-5-parted ; 

 segments keeled or winged on the back. Corol'.a 4-5-clefl, 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- 

 lx>se panicles of flowers. 



1 S. CORDA'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. 0.G. 

 Native of the Cape of Good Hope. E'xacum cordatum, Lin. 

 syst. 155. suppl. 124. Cham, et Schlecht in Linnaea, 194. 

 Gentiana exacoides, Lin. spec. p. E'xacum grandiflorum, Gaertn. 

 fruct. 2. p. 158.t. 114. Burm. afr. t. 74. f. 5. Corolla yellow, 

 with a cylindrical tube and obovate segments. Habit of Ery- 



thrafa Cenlaurium. In all the varieties the stamens are said to 

 be inclosed in the throat of the corolla. 



far. a, macrdntha (Cham, et Schlecht in Linnaea, 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. 



Far. j3, intermedia (Cham, et Schlecht, 1. c.) keels of calyx 

 with narrow, smooth, almost evanescent wings ; corolla smaller, 

 half an inch long, twice as long as the ca!yx. 



Var. y, micrdntka (Cham, et Schlecht. 1. 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. aim. p. 94. t. 275. f. 4. 



Cordite-leaved Sebaea. Fl. July, Aug. Clt. 1815. PL i 

 to | foot 



2 S. SULPHU'REA (Cham, et Schlecht. in Linnaea, 1. p. 192.) 

 stem dichotomously and corymbosely branched, sub-tetragonal ; 

 leaves sessile, broad, ovate, acute, 1 -nerved ; calyx nearly glo- 

 bose, with acute segments, which are winged by a narrow keel 

 on the back ; flowers 5-cleft ; stamens exserted. 0. 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 Sebaea. PL $ foot. 



3 S. CRASSUUEFOLIA (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. Q. 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-kated Sebaea. PL 1 to 1-J foot. 



4 S. CAPITA'TA (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. 0.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 Sebaea. PL ^ 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. Gentiana aurea, Thunb. E'xacum aureum, 

 Lin. syst. 155. suppl. 123. Lam. ill. t. 80. f. 2. E'xacum sessile, 

 Lin. Plukn. phyt. t. 275. f. S. Corolla golden yellow, with 

 lanceolate, acute segments. Habit of Erythrce'a Centaurium. 



Var. ft ; flowers pale yellow. Cham, in Linnaea, 6. p. 646. 

 Go&fen-flowered Sebaea. FL Ju. Aug. Clt. 1824. PL i 

 foot. 



6 S. A'LBENS (R. Br. 1. c.) stem tetragonal, dichotomously 

 branched, fastigiate ; leaves cordate, decurrent, 3-nerved ; flowers 

 5-cleft, terminal ; calycine segments keeled on the bar.k ; sta- 

 mens exserted. 0. G. Native of the Cape of Good Hope. 

 E'xacum albens, Lin. syst. 155. suppl. 123. E'xacum peduncu- 

 latum, Lin. Gentiana albens, Thunb. Corolla whitish ; tube 

 longer than the calyx ; and the limb length of the tube. Burm. 

 afr. p. 207. t. 74. f. 4. 



NArfe-flowered Sebaea. FL Aug. Clt. 1820. PL | foot. 



7 S. OVATA (R. Br. prod. p. 452.) stem branched, dichoto- 



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