BORAGINE/E. XXXVIII. Coxpenia. 
6 T. monosra‘cuyum (Cham. in Linnea, 4. p. 455. under 
Heliotrópium) ; this species is very nearly allied to 7'. heliotro- 
pioides, but differs in the spikes being simple and solitary, never 
twin; and in the leaves not being so opposite; stem dichoto- 
mous; strige adpressed. h. S. Native of tropical Brazil. 
Leaves with the petioles, 4-43 inches long, and 15 lines broad. 
Spikes half a foot long. 
One-spiked Tiaridium. Shrub } to 14 foot. 
Cult, The three first species being annuals, the seeds of them 
should be sown on a hot-bed early in spring ; and the plants 
may be planted out in the open border, in a warm, dry, shel- 
tered situation, about the middle of May. The rest should be 
treated in the manner recommended for the shrubby species of 
Heliotrópium. 
XXXVIII. COLDENIA (named by Linnaeus in honour of 
Conwallades Colden, a North American botanist, who disco- 
vered many new plants; these are published in the Upsal Acts 
for 1743.) Lin. gen. no. 173. Schreb. gen. no. 233. Juss. 
gen. 130. edit. Usteri, p. 145. Lam. ill. no. 248. t. 89. Gaertn. 
fruct. 1. no. 424. t. 68. f. 8. Lehm. asper. p. 7.—Tiquilia, 
Pers. ench. 1. p. 57. 
Lin. syst. — Pentándria, Monogynia. Calyx 5-parted. Co- 
rolla funnel-shaped ; throat wide, naked; limb flat; segments 
equal. Style bifid at apex. Carpels 4, 1-celled, convex out- 
side, coherent, closed at the base, beaked, without any manifest 
receptacle.—Prostrate plants, with alternate leaves, and axillary 
flowers. 
1 C. procu’mBens (Lin. fl. zeyl. p. 69. spec. p. 182.) leaves 
cuneiform, petiolate, having one of the sides shorter than the 
other, coarsely serrated, plicate ; flowers axillary, usually soli- 
tary; carpels wrinkled. ©. S. Native of the East Indies. 
Willd. spec. 1. p. 712. Lehm. asper. p. 8. Lam. ill. t. 89.— 
Plukn. alm. t. 64. f. 6. Stem villous. Leaves 3 to 1 inch 
long, beset with adpressed hairs above, except in the plica, vil- 
lous beneath. Flowers supra-axillary, sessile, white. 
Procumbent Coldenia. Fl. July, Aug. Clt. 1699. 
cumbent. 
2 C. picHéroma (Lehm. asper. p. 9.) leaves lanceolate, attenu- 
ated at the base, lined, hoary; flowers crowded; carpels smooth. 
b.S. Native of Peru, in sandy places about Lima. Lithos- 
pérmum dichótomum, Ruiz. et Pav. fl. per. 2. p. 5. t. 8. f. c. 
Tiquília dichótoma, Pers. ench. 1. p. 157. Plant hispid, hoary. 
Stems dichotomous, geniculate, hispid at top. Leaves rather 
plicate, pilose, with reflexed, subrepand margins. Flowers ses- 
sile, axillary, violaceous ; segments of the limb emarginate. 
Dichotomous Coldenia. Shrub procumbent. 
Cult. For culture and propagation see Tiarídium above. 
Pl. pro- 
XXXIX. HALGA'NIA (named by Gaudichaud after Admi- 
ral Halgan, of the French navy.) Gaud. in Freyc. voy. pt. bot. 
p- 448. t. 59. 
Liw. syst. Pentándria, Monog?jnia. Calyx 5-cleft, regular. 
Corolla funnel-shaped ; tube short; segments spreading, obtuse. 
Stamens inclosed; anthers erect, fixed by the base, where they 
are cordate and cohering, drawn out each into a linear appen- 
dage at apex. Style longer than the stamens; stigma simple, 
obtuse. Fruit obliquely and tetragonally ovate, coriaceous, bi- 
partible; divisions 2-celled ; cells 1-seeded ; premature seeds 
linear-reniform, suspended towards the middle of the inner 
parietes of the cell. —4A branched, pilose shrub. Branches scat- 
tered. Leaves scattered, lanceolate, cuneated, a little toothed, 
3-lobed at apex, and sometimes entire. Corymbs terminal, 
bractless. Flowers blue. 
XXXIX. HALGANIA. 
365 
1 H. rirron4' Lis (Gaud. l. c. p. 449.) h. G- Native of 
New Holland, on the western coast, along the shore in Shark's 
Bay. 
Sea-shore Halgania. Shrub. 
Cult. For culture and propagation see Heliotropium, p. 364. 
XL. Prestwa. XLI. EuProca. XLII. Tournerortia. 
XL. PRESL/EA (named after J. and C. B. Presl, of 
Prague, brothers, experienced naturalists.) Mart. bras. 2. p. 
75. t. 164. 
Lin. syst. | Pentándria, Monogynia. Calyx 5-parted. Co- 
rolla funnel-shaped ; limb 5-cleft, with a plica between each of 
the segments, which are falcate and bent inwards; throat fur- 
nished with 5 fascicles of pili just above the connivent anthers. 
Anthers appendiculate at the base. Style from the top of the 
ovarium; stigma from a conical disk. Fruit dry, divisible into 
4 1-seeded parts or carpels.—4A branched diffuse herb, with the 
habit of Lithospérmum orientale, clothed with simple hairs. 
Leaves alternate, lanceolate. Flowers axillary, solitary, on short 
pedicels. Corollas yellow. Perhaps Lithospérmum Orientale is 
a species of Presle‘a. 
1 P. ranaDóxa (Mart. l. c. p. 76.) stem much branched, dif- 
fuse, hoary and hispid; leaves narrow-lanceolate, acute. XY. 
Native of Brazil, in the province of Bahia, on the sandy 
banks of the river St. Francisco, near Joazeiro. Ovarium 
ovate. Carpels perforated at the base, fixed to the central 
column ? cohering. 
Paradoxical Preslea. PI. diffuse. 
Cult. For culture and propagation see Heliotrépium, p. 364. 
XLI. EU'PLOCA (from ev, eu, well; and exw, pleco, to 
fold; in reference to the peculiar character of the corolla.) 
Nutt. in amer. phil. trans. n. s. 5. p. 189. * 
Lin. syst. — Pentándria, Monogynia. Calyx 5-parted. Co- 
rolla funnel-shaped ; limb flat, plicate, 5-angled ; throat naked. 
Genitals inclosed. Stigma annular, bearded at apex. Carpels 4, 
approximate, by pairs, angular, imperforated at the base, oblique, 
fixed to the calyx.—Herbaceous. Leaves rough, alternate. 
Flowers scattered, with a plicate limb, as in Convolvulàcece. 
Said by Nuttall to be allied to Messerschmidtia and Argüzia, 
but the fruit is ditferent. 
1 E. convotvura‘cea (Nutt. l.c. p. 190.) ©. H. Native 
of North America, on the sandy bas of the Arkansas. Stem 
angular, 4-6 inches high. Leaves’ scabrous from adpressed 
hairs: lower ones alternate. Flowers lateral, approximating, 
and nearly sessile. Corolla rough, pilose outside, size of those 
of Quámoclit vulgaris. Perhaps this plant ought to be united 
with Tournefortia Argüzia of Siberia. 
Convolvulaceous-flowered Euploca. Pl. 4 foot. 
Cult. For culture and propagation see 7iaridium above. 
XLII. TOURNEFO'RTIA (so named by Linnzeus in me- 
mory of Joseph Pitton de Tournefort, the famous author of an 
elegant arrangement of plants, under the title of “ Institutiones 
Rei Herbarie," 1694, 8vo. and 1700, in 3 vols. 4to. with 
figures of all the genera then known; also author of “ Corolla- 
rium Inst." &c. 1793 ; ** Catalogue of the Plants about Paris,” 
1698; ‘Relation d'un Voyage du Levant," 1717, &c. The 
first-mentioned work is the foundation of the arrangement now 
followed, called the Jussieuan, or Natural System.) Lin. gen. 
no. 192. Schreb. gen. no. 253. Gaertn. fruct. 1. p. 365. t. 76. 
Juss. gen. 129. R. Br. prod. 496. H.B. et Kunth, nov. gen. 
