ARAGOACEZE. 
This order is nearly related to the Polemoniàcec ; but differs 
from it, in its undivided stigma, in the confluent cells of the 
anthers and bilocular ovarium; and from Scrophularinece, in its 
regular flowers, foliaceous embryo, and convolute estivation of 
the corolla, 
I. ARAGO^A (named in honour of Francisco Arago, member 
of Academy of Paris; the celebrated astronomer.) H. B. et 
Kunth, nov. gen. amer. 1. p. 154. t. 216-217. 
Lin. syst.  Tetrándria, Monogijnia. Character the same as 
that of the order. 
1 A. curre’ssina (H. B. et 
Kunth, nov. gen. amer. 3. p. 
156. t. 216.) branches downy ; 
leaves scale-formed, ovate-del- 
toid, glabrous, closely adpressed, 
with rather woolly edges; throat 
of corolla villous. h.G. Native 
of Santa Fe de Bogota. A. 
junipérina, H. B. et Kunth, l. c. 
t. 216. 0. Segments of corolla 
obovate, ciliated. Margins of 
the segments of the calyx ci- 
liated. Anthers cordate, reni- 
form. Filaments villous at the 
base. 
Cypress-like Aragoa, Shrub. 
2 A. ABIETINA (H. B. et 
Kunth, nov. gen. amer. 3. p. 156.) branches glabrous; leaves 
linear, spreading, ciliated a little; corolla glabrous. k. G. 
Native along with the preceding. Branches 3-4 in a whorl. 
Fir-like Arogoa. Shrub. 
Cult. Aragòa is a genus of beautiful and singular shrubs. 
Should either of them ever be introduced to our gardens, we 
would recommend their being treated as greenhouse plants; to 
be planted in pots, well drained with sherds, in a mixture of 
peat and sand. 
FIG. 25. 
Orper CLXII. POLEMONIA'CEZ (the plants contained 
in this order agree in important characters with the genus Pole- 
monium.) Juss. gen. p. 136. ed. Usteri, p. 152. D. Don, in 
edinb. phil. journ. H. B. et Kunth, nov. gen. amer. 3. p. 160. 
Calyx tubular (f. 26. a., f. 27. a.), 5-cleft (f. 27. a.), or 5- 
toothed (f. 26. a.). Corolla rotate (f. 26. b.), or salver-shaped 
(f. 26. d.), or often funnel-shaped (f. 29. 5.) ; limb 5-lobed (f. 
27. d., f. 29. b.), imbricate or twisted in zstivation. Stamens 
5 (f. 26. c., f. 27. b., f. 29. c.), inserted sometimes beneath, and 
sometimes above the middle of the tube; anthers sagittate (f. 
29. c.), incumbent, 2-celled. Ovarium simple, 2-celled (f. 28. 
f), entire; ovula numerous, rarely definite. Style very long 
(f. 29. d.); stigma 3-lobed (f. 27. c., f. 29. e.) : lobes linear, 
obtuse. Capsule 3-celled (f. 28. f), 3-valved, oblong, trigonal, 
rarely globose ; valves opposite to the margins, septiferous inside 
in the middle, usually membranous, rarely thickish, and crusta- 
ceous, as in the genus Céntua ; placenta trigonal, central, applied 
to the angles of the dissepiments. Seeds convex, angular, naked ; 
or compressed and girded by a membrane; testa simple, mem- 
branous, the surface mucilaginous. Albumen fleshy, conform- 
ing to the seed. Embryo straight, large ; with flat, orbicular or 
oval, somewhat foliaceous cotyledons; and a thickish, obtuse, 
I. ARAGOA. 
POLEMONIACEE. 231 
straight, inferior radicle, which is generally shorter than the co- 
tyledons.— Beautiful herbs or shrubs, usually branched. Leaves 
usually alternate, more rarely opposite, exstipulate, undivided, 
pinnatifid, or pinnate. Flowers terminal, numerous; or axil- 
lary, and nearly solitary, in most of the species bracteate. Co- 
rollas showy, blue, red, or white. 
This order is characterized by a regular, 5-lobed corolla ; 
a triple stigma ; a 3-celled, 3-valved capsule, with septife- 
rous valves; seeds numerous, or definite, attached to a 3- 
sided, central placenta, covered by a thin, mucilaginous inte- 
gument, and furnished with a fleshy albumen; and, lastly, 
by a straight embryo, with somewhat foliaceous cotyledons. 
The most nearly allied order to it is Convolvulacee, which, 
however, is readily distinguished from it, by having a simple 
or double stigma; by the septa instead of proceeding from 
the centre of the valves, being directed to their margins; 
and the seeds having no central placenta, being attached to the 
bottom of the cells. The seeds are very different, being covered 
by a thin, very fragrant, mucilaginous albumen; with a curved 
embryo, having large, foliaceous, plaited, and wrinkled, emargi- 
nate cotyledons. The Polemoniàcece, through the genus Cántua, 
has some affinity likewise with Bignoniacee ; but that order has 
an irregular corolla; a bilamellate stigma ; a very different cap- 
sule; transverse seeds, destitute of albumen; and lastly, a 
foliaceous embryo, with a curved radicle. Externally the 
Plumbaginec, have some resemblance to the Polemoniacea, 
through Phléx and Plumbago; but the former order has 4 or 5 
stigmas, and a simple ovarium attached to the bottom of the 
calyx. 
Synópsis of the genera. 
1 Poremonium. Calyx campanulate, 5-cleft (f. 26. a.) Co- 
rola rotate (f. 26. b.); limb erect. Stamens inserted in the 
throat (f. 26. c.), bearded at the base; cells of capsule many- 
seeded. 
2 Diare'nsta. Calyx 5-parted, coriaceous, tri-bracteate at 
the base. Corolla salver-shaped; tube short. Stamens inserted 
in the recesses of the corolla, nearly sessile. Stigma obsoletely 3- 
lobed. Cells of capsule many-seeded. 
3 Pnróx. Calyx deeply 5-cleft (f. 27. a.), connivent. Co- 
rolla salver-shaped (f. 27. d.) ; tube elongated; limb twisted in 
zestivation ; with cuneated segments. Stamens inserted above 
the middle of the tube. Cells of capsule 1-seeded. 
4 Huerta. Calyx tubularly campanulate ; segments some- 
what spinose, linear. Corolla funnel-shaped ; tube short, ex- 
serted ; segments of the limb oblong. Stamens inserted at the 
throat. Cells of capsule many-seeded. 
5 LiwA'sTHus. Calyx tubular; with 5 strong green nerves, 
which are drawn out into subulate, recurved teeth at the apex. 
Corolla funnel-shaped; tube short; segments of limb obovate, 
crenulated at apex. Stamens inclosed. Cells of capsule many- 
seeded. 
6 Lrzrrosieuow. Calyx tubularly-campanulate ; lobes linear, 
subulate. Corolla funnel-shaped ; tube very long, slender; 
limb campanulate; with oval, obtuse lobes. Stamens inserted 
at the throat. Cells of capsule many-seeded. 
