UMBELLIFERZ. VI. Duniscus. 
the appearance of a head of the flowers of Scabidsa Caucdsica, 
but the flowers are on longer pedicels : pedicels, after flowering, 
twisted inwards, bearing the fruit, which lies within the invo- 
lucel, but erect at maturity. Fruit, when young, rather hairy, 
but in the adult state it is covered with minute tubercles. This 
is one of the most showy plants of the order. 
Blue-flowered Didiscus. Fl. July, Sept. 
to 2 feet. 
2 D. avsirtorus (D.C. prod. 4. p. 72.) plant glabrous; ra- 
dical leaves on long petioles, palmate ; segments dilated at the 
apex, cut, toothed ; cauline leaves few, small; umbels simple, 
on long peduncles. 2. G. Native of New Holland, at Port 
Jackson. Trachymène incisa, Rudg. in Lin. trans. 10. p. 300. 
t. 21. f. 2. Fruit much compressed, beset with minute tuber- 
cles. Petals white. 
White-flonered Didiscus. Clt. 1819. PI. 14 foot. 
Cult. Sow the seed of these plants on a slight hot-bed in 
spring, and when the plants are 2 inches high, plant them separ- 
ately into small pots, and shift them from size to size of pots as 
they grow. 
Cltus27 Piet 
VII. TRACHYME'NE (from rpaxve, trachys, rough, and 
ùunv, hymen, a membrane ; channels of fruit). Rudge, in Lin. 
trans. 1811. vol. 10. p.300. Spreng. umb. spec. p. 8. Koch. 
umb. p. 143. D. C. coll. mem. 5. p. 28. prod. 4. p. 72.—Azo- 
rélla, Labill. nov. holl. 1. p. 74. Rich. hydr. p. 21. t. 52. f. 6. 
but not of Lam.—Azorélla species, Cav.—Fischéra species, 
Spreng. umb. prod. p. 27. but not of D. C.—Fischéra, Lag. am. 
nat. 2. p. 93. but not of D. C.—Catépha, Leschen. ined.—Sie- 
bèra, Rchb. 
Lin. syst. Pentándria, Digýnia. Margin of calyx 5-toothed. 
Petals elliptic, entire, acutish, straight at the apex, rather valvate 
in estivation; styles diverging. Fruit didymous, compressed, 
and contracted from the sides; mericarps gibbously convex, 
without any vittee, 5-ribbed: the 3 dorsal ribs and their channels 
muricated with tubercles: lateral ones marginal. Carpophore 
undivided. Seed gibbously convex, flattish in front.—Herbs or 
subshrubs, all natives of New Holland. Umbels compound, 
many-rayed: umbellules containing 3-12 flowers. Involucrum 
of many leaves. This genus agrees with Hydrocétyle in the 
fruit being compressed; the rest agrees with Azorélla. Poran- 
théra of Rudge agrees with this genus in habit, but the structure 
of the flowers is very different, and most probably belongs to 
the order Treméndree. 
Secr. I. Puatyme'ne (from mAarue, platys, broad; stems 
compressed). D.C. prod. 4. p. 72. Plant herbaceous. Stems 
much compressed. Leaves small, cut. 
1 T. a’ncers (D. C. prod. 4. p. 73.) plant glabrous, nearly 
leafless ; stem 2-edged, branched ; leaves also at the tops of the 
branches cut into a few fine lobes. 2%. G. Native of New 
Holland. It agrees with T. compréssa in the stem being com- 
pressed, but it is one half narrower, the leaves more finely 
cut, the umbel more slender. The fruit has not been seen, 
but the analogy of the herb with the following species is suffi- 
cient to indicate its belonging to the same genus. 
Two-edged-branched Trachymene. PI. 1 foot. 
HT. compre’ssa (Spreng. umb. spec. p. 9. exclusive of the 
Chili specimen) plant glabrous, nearly leafless; leaves very few, 
small, binate or ternate: upper ones linear, entire; stem 2- 
edged, branched. %. G. Native of New Holland, on the 
sandy coast, Azorélla compréssa, Labill. nov. holl. 1. p. 75. 
t. 101. Fruit compressed, obovate; mericarps convex on the 
back, 3-ribbed : ribs wrinkled from the tubercles. Involucrum 
shorter than the pedicels, 
Compressed Trachymene. 
VOL, IIL, 
Pl. 1 foot. 
VII. TRACHYMENE. 257 
Sect. II. Denprome‘ne (from devdpov, dendron, a tree; in 
reference to the species being shrubby). D.C. prod. 4. p. 73. 
Plants shrubby. Leaves entire. 
3 T.11nea‘r1s (Spreng. umb. spec. p. 7.) plant quite gla- 
brous, shrubby ; leaves scattered, erect, linear, subulate and acute 
at the apex. h.G. Native of New Holland, at Port Jackson. 
Sieb. pl. exsic. nov. holl. no. 126. Azorélla linearif lia, Cav. 
icon. 5. t. 485. Azorélla linearifdlia, Pers. ench. 1. p. 303. 
Fruit obovate, compressed; mericarps 3-ribbed; ribs rough 
from rows of tubercles. Flowers yellow. 
Linear-leaved Trachymene. FI. Ju. Aug. Clt. 1824. 
1 to 2 feet, 
4 T. re‘nuis (D.C. prod. 4. p. 73.) shrubby; branches te- 
rete, beset with glandular hairs at the apex ; leaves scattered, 
spreading, linear, acute; umbels few-flowered. h. G. Na- 
tive of New Holland. Branches very slender. Leaves hardly 
4 line broad, and 3-4 lines Jong. Umbel trifid: umbellules 
Sh. 
3-5-flowered. Ribs of fruit scabrous from tubercles. Very 
like T. ericotdes. 
Slender Trachymene. Shrub 1 foot. 
5 T. susvetutina (D. C. 1. c.) shrubby; branches terete ; 
leaves linear, thickish, acute, velvety from short crowded down, 
as well as the branchlets; umbels crowded. h.G. Native of 
New Holland, at Port Jackson. The leaves are almost like 
those of T. ericotdes, but differ in being velvety and erectish. 
Branches hardly diverging. 
Rather-velvety Trachymene. Shrub 1 foot. 
6 T. ertcoipes (Sieb. pl. exsic. nov. holl. no. 121.) shrubby ; 
branches rather angular, glabrous; leaves linear, acute, spread- 
ing; umbels crowded. h. G. Native of New Holland. 
Branches numerous, spreading. Leaves a line broad, with the 
margins hardly revolute when dried. Umbels 5-cleft: umbel- 
lules 5-6-flowered. Fruit scabrous from tubercles on the ribs. 
Heath-like Trachymene. Shrub. 
7 T. tancroxa'ra (Rudge, l. c. Spreng. syst. 1. p. 879.) 
shrubby ; branchlets rather angular, glandular, and velvety when 
examined by a lens; leaves lanceolate-linear, nerved, erect ; 
umbels crowded, many-flowered. h. G. Native of New 
Holland. Azorélla lanceolata, Labill. nov. holl. 1. p. 74. t. 99. 
Leaves an inch and a half long, and 2 lines broad. Leaves of 
the involucrum the length of the umbel. Umbels 5-8-rayed ; 
umbellules 8-10-flowered. Branches sometimes terminated by 
an 8-10-flowered, simple umbel. 
Lanceolate-leaved Trachymene. Shrub 1 foot. 
8 T. myrriroxta (Sieb. pl. exsic. nov. holl. no. 125.) shrubby ; 
branches rather angular, hardly glandular or puberulous, even 
when examined bya lens: leaves oval-oblong, rather attenuated 
at both ends; umbels crowded, many-flowered. h.G. Na- 
tive of New Holland. Very nearly allied to T. lanceolata, but 
differs in the leaves being 9-10 lines Jong, and 3 lines broad. 
Umbels 8-10-rayed: umbellules 8-12-flowered. 
Myrtle-leaved Trachymene. Shrub. 
9 T. ovatus (D. C. prod. 4. p. 73.) shrubby; branches 
densely clothed with short hairs; leaves oval, nerved, scattered, 
nearly sessile, hardly attenuated at either end; umbels many- 
flowered, crowded. h.G. Native of New Holland. T. ovata, 
Spreng. umb. spec. p. 8. (exclusive of the syn. of Labill.). Sieb. 
pl. exsic. nov. holl. no. 124. Perhaps only a variety of T. 
myrtif dlia. 
Var. B, conférta (D. C. 1. c.) leaves and branchlets much 
crowded. h. G. Native of New Holland, at Port Jackson, 
Perhaps a proper species. 
_Oval-leaved Trachymene. Shrub 1 foot. ; 
10 T. ova`ra (Rudge, l. c. but not of Spreng. nor Sieb.) 
shrubby: branches smoothish ; leaves broadly ovate, nearly ses- 
sile, hardly longer than broad ; umbels crowded, many-flowered. 
L1 
