- Hylrocolyle.] LVI. UMBELLIFER. 341 
seems to have suspected dimorphism. An observation of numerous specimens seems to show 
that the differences are those of semisexual dimorphism. In the long-pedicelled umbels the 
are more expanded, the stamens longer, and the ovary enlarges but little, and ulti- 
mately withers without forming good seed. I have only found ripe fruits in the dense 
umbels, in which the pedicels rarely attain 1 line. In these the petals open less freely, 
imes vim till they fall, and the stamens are shorter. I have found both kinds of 
on the , 
m same specimen 
to 30 very small flowers, on filiform pedicels varying from 1 to 3 lines in 
length.  Braets ali broad, short, and scarious. Ovary at the time of flower- 
Ing not 1 line long and . Petals valvate, glandular. Styles rather 
long. Fruits about 3 line broad, smooth or granular, with 2 scarcely promi- 
nent ribs on each side. 
N.S. Wales. Richmond river, Beckler.—The species requires further investigation. 
Some of the apparent characters may be due to the circumstances under which the speci- 
were growing. 
ô. H. tripartita, R. Br. i» A. Rich. Hydroc. 69. t. 61. f. 25. Small 
| and very slender, sometimes densely matted, or the filiform stems extending 
. lo several in., glabrous or sprinkled with a few hairs, Leaves ivided to the 
ES into 3 to 5 cuneate entire or 2- or 3-toothed segments, rarely above 
long, and sometimes not 13 lines. Stipules entire. — Peduneles filiform, 
shorter than the leaves, each with an umbel or head of 3 to 6 or rarely more 
Small dowers nearly sessile. Fruits 2$ line diameter, with 2 slightly promi- 
Ment ribs on each side, smooth or granular; carpels convex on the sides, the 
dorsal edge obtuse.—DC. Prod. iv. 65. 
Queensland, i j 
à S. Wales. ien Fil nc Sieber, n. 411 (partly), W^ P i 
i ar. muscosa, V ed; stems often under lin. long; leaves 
i an 3 in. bnt Pomp gene Ee A. Rich, Hydroc. 68. t. 61. f. 27; DC. 
-Wv. 64; Hook. f. Fl. Tasm. i. 154. 
F victoria. Broken River, F. Mueller. " Eng 
asmania, 2. Brown ; Circular Head, forming large patches in moist places, Gunn. 
| 1. H, plebeia, R. Br. in A. Rich. Monogr. 46. t. 60. f. 23. A rather 
E large Species, creeping and rooting at the lower nodes, quite glabrous. 
Leaves orbicular-cordate or reniform, crenate or shortly 9- M 11-lobed, 3 to 
pog laterally, with the dorsal edge acute but not i * Sr IM 
denm King George's Sound, R. Brown ; also Drummond, 2 con. 
tae is allied to H. pu^. tie Linn., ee? aeger nb fruit much, smaller 
j *9 liat, connecting the species with the larger forms of f. a : 
wer rata, Benth. in fin. Enum. 53, was descri m ine I sow 
ten variety of H. plebeia, in which the lateral ribs of the earpels are slightly prom- 
between the primary ones, giving the whole fruit a striate appearance, 
