46. imbo 
| to 2 ft. high, woolly-white or at length nearly glabrous. 
mero 
Helipterum.] LXII. COMPOSITAE. 645 
S. Australia. Gawler Town, Burra-Burra, St. Vincent’s Gulf, F. Mueller ; Lake 
Gillies, Burkitt. 
Vi 
bracts is less marked, are difficult to distinguish from yellow specimens of H. Cotula. The 
achenes appear to be larger than in that species (almost transparent in unripe specimens), 
and the scales on the peduncles do not occur in H. Cotula. 
Section II. Prerorocon.—Involucres ovoid, turbinate-campanulate or 
cylindrical, the outer bracts appressed, scarious or rigid, the inner or interme- 
diate ones with or rarely without radiating petal-like lamina or tips. Achenes 
villous. Florets rarely above 10. 
14. H 
H. polyphyllum and H. Humboldtianum, but only the upper portion ia the 
stems seen, the inflorescence and foliage with loose cottony wool. Leaves 
linear or linear-oblong, obtuse, flaccid. Flower-heads small, numerous, in a 
ne. Florets about 8 to 10, all herma- 
] 
- Phrodite. Achenes shortly hirsute, but only seen very young. Pappus of 
| 15 to 20 finely plumose bristles. 
Murchison river, Oldfield. This species appears to connect the genus 
= .W. Australia, Th l 
With Cephalipterum, which scarcely differs except in its much more compact inflorescence. 
15. H. polyphyllum, F. Muell. Fragm. i. 35. An erect annual of 
about 1 to 13 ft., not much branched and slightly woolly. Leaves geht 
linear, 1 to 2 in. long. Flower-heads small, rather numerous, in n 
corymbs.  Involuere ovoid or narrow-campanulate, nearly 3 lines long, 
d, Bowman and others; basaltie plains, from the Brisbane to Peak Range 
eenslan ] 3 
KÉ Kent’s Plains, W. Hill; plains of the Condamine, Leichhardt ; Rockhampton, 
— Thozet. ` 
i DC. Prod. vi. 216. Erect, probably annual, 
H, Humboldtianum, ro pr eege 
linear-laneeolate, acute. Flower-heads small, numerous se terminal 
. Porymbs.  Involucre cylindrical, 2 to 23 lines long without the rays, the outer 
^ 
| 
S 
j 
g 
bracts closely imbricate with very short squarrose scarious tips, the inner 
ovih slightly woolly-ciliate claws and radiating rather rigid petal-like laminæ, 
h 
to 2 lines long, of a bright yellow passing (when dry) into a metallic- 
i i he inner ones 
Heen, Florets about 10 to 12, all hermaphrodite, a few of t 
 Sometimés sterile. Achenes silky-hirsute. Pappus of 15 to 20 plumose 
bristles,— li Humboldtianum, Gaudich. in Freyc. Voy. Bot. 465. 
L 88. Find ges i Steetz in Pl. Preiss. i. 481; Pteropogon 
