720 
-LX. UMBELLIFER^E. 
[Siebera. 
rugose, the ribs scarcely conspicuous, or both the dorsal and intermediate ones 
prominent, or the latter depressed. Carpels turgid, leaving a narrow furrow 
between them at the commissure. 
Hab.: Various southern localities. 
A most variable species as to the form of the leaves, and might indeed include the preceding 
two species. — Benth. 
4. XANTHOSIA, Rudge. 
(From the yellow-coloured hairs which clothe some species.) 
(Leucolaena, R. Br.: Schcenolrena, Bunge; l’entapeltis, Bunge.) 
Calyx- lobes orbicular ovate or lanceolate, peltate cordate or not attached by 
the whole of the base. Petals with an induplicate point and reduplicate margins, 
slightly imbricate or almost valvate. Disk of 2 prominent lobes or glands at the 
back of the styles or rarely almost Hat. Fruit laterally compressed, notched at 
the base with rounded auricles, without vittse, the carpophore persistent, the dorsal 
edge of the carpels obtuse, the primary and often some oi the secondary ribs 
prominent and curved at the base. Seed somewhat compressed. — Herbs or small 
shrubs, diffuse or decumbent at the base or erect, often clothed with soft long 
hairs mixed with a stellate tomentum. Leaves toothed, lobed or ternately 
divided. Umbels usually compound, the partial ones with two or three bracts 
and several almost sessile flowers, the general one of 3 or 4 rays and as many 
bracts, but sometimes the whole umbel reduced to very few or to a single flower. 
The genus is confined to Australia. 
1. X. pilosa (hairy), Rudye in Tram. Linn. Soc. x. 301 t. 22,/. 1 ; Benth. 
FI. Austr. iii. 360. An erect or more frequently diffuse or procumbent, much 
branched, leafy shrub, of 1 to 2ft., copiously clothed with rather long hairs 
intermixed with a brown stellate tomentum, or very rarely in mountain situations 
becoming almost glabrous. Leaves cuneate, obovate, oblong, lanceolate or 
broadly ovate, coarsely sinuate-toothed, 3 or 5-lobed or rarely 3-partite, the 
central lobe always longer than the lateral ones, rarely exceeding lin., the petiole 
short, dilated and ciliate at the base, but without real stipules. Peduncles 
usually 2 together at the nodes, very short or slender and nearly as long as the 
leaves, each usually with 2 flowers, more rarely 3 or only 1, with 2 or 3 small 
narrow bracts forming a general involucre at the base of the short pedicels or 
rays, and 2 or 3 oblong-lanceolate bracts of 2 or 3 lines, forming a partial 
involucre under each flower. Calyx-lobes rather thickened at the base, but 
neither cordate nor peltate. Petals narrow, with a long inflexed point. Disk- 
lobes thick, pubescent. Fruit rather above 1 line long and broad, the inter- 
mediate and secondary ribs prominent, the lateral ones scarcely distinct from the 
commissure. — A', nwntana, Sieb. in DC. Prod. iv. 74 ; Hook. f. FI. Tasm. i. 155 ; 
X. hirsuta, DC. Prod. iv. 74 ; Leucoltena pannosa, Benth. in Hueg. Enum. 55 
(more densely villous, with longer leaves). 
Hab.: Islands of Moreton Bay and some few other southern localities. 
One-flowered and two-flowered involucres, on which two species have been frequently distin- 
guished, occur sometimes on the same specimens. The glabrous specimens, from mountain 
situations, appear at first sight very distinct, but I can find no other difference than the want 
of hairs. — Benth. 
5. ACTINOTUS, Labill. 
(Involucre rayed.) 
(Eriocalia, 8m.; Holotome, Until.; Hemiphues, Hook, /.y 
Calyx-limb distinct, campanulate or open, truncate or 5-lobed. Petals 5, 
unguiculate, spathulate or orbicular-concave, imbricate in the bud, or none. 
Disk-lobes or glands at the back of the styles, often not quite at the base. Ovary 
