S44 LXV. COMPOSITE. [RiuidosU. 



1. B.. helichrysoides (Helichrysum-like), DC. Prod. vi. 159 ; Benth. Fl. 

 Auftr. iii. 594. A perennial with a hard woody stock and erect branching stems 

 of 1 to 2ft., cottony-white as well as the foliage. Leaves linear or the lower 

 ones oblong-spathulate, 1 to 2in. long, or the upper ones smaller, obtuse or 

 with callous points, not decurrent. Flower-heads on terminal peduncles. 

 Involucre broadly hemispherical, in some specimens all under ^in. diameter, in 

 others larger, the bracts cuneate at the base, with elegantly ciliate scarious 

 transversely wrinkled laminae, loose but scarcely radiating. Florets yellow, 

 5-toothed. Anthers exserted. Achenes glandular-papillose. Pappus of 5 to 7 

 spathulate scales, about as long as the achene. — B. auricoma, F. v. M. in Linnsa, 

 XXV. 408. 



Hab.: Southern downs. 



2. R. leucantha (flowers white), F. v. M. Fragm. i. 35 ; Benth. Fl. Aiutr. 

 iii. 594. Erect, branching, wooUy-tomentose, 1 to 2ft. high and perhaps annual, 

 although with a hard almost woody base. Leaves lanceolate or the upper ones 

 linear, not decurrent, losing the wool on the upper side. Flower-heads on long 

 peduncles, about the size and shape of those of R. helichrysoides, but the 

 involucral bracts not ciliate and the florets white and rather more slender. 

 Achenes glandular. Pappus of about 10 cuneate scales, slightly denticulate at 

 the end. 



Hab.: Inland tropics. 



3. R. Murchisonii (after R. Murchison), F. v. M. Fragm. i. 34 ; Benth. Fl. 

 Austr. iii. 594. Erect and branching, rather slender, slightly woolly-tomentose, 

 the specimens under 1ft. high. Leaves linear, not decurrent. Flower-heads on 

 long peduncles, smaller than in II. helichrysoides. Involucres broadly hemi- 

 spherical, rarely fin. diameter, the laminae of the bracts ovate, scarcely ciliate. 

 Florets yellow, 5-toothed. Anthers not exserted. Achenes papillose. Pappus 

 of 8 to 12 lanceolate, acute, ciliate scales. 



Hab.: Burnett Eiver and Wide Bay. 



88. AMMOBIUM, R. Br. 

 (Found on sandy soil.) 



Involucre hemispherical, the bracts either petal-like and spreading or scarious 

 and more appressed. Receptacle more or less convex with flat or slightly concave 

 scales between the florets. Florets all tubular, hermaphrodite, 5-.toothed. 

 Anthers with fine tails. Style-lobes truncate. Achenes 4-angled. Pappus a 

 membranous cup, either truncate and entire or more or less produced into 2 or 4 

 unequal teeth or short awns. — Herbs more or less white-tomentose. Leaves 

 entire. Flower-heads solitary, terminating the stem or branches. 



The genus is limited to Australia. 



1. A. alatum (stems winged), B. Br. in Bat. Mag. t. 2459 ; Benth. Fl. 

 Austr. iii. 588. An erect, branching, white-tomentose herb, attaining 2 or 3ft., 

 the stems bordered by wings decurrent from the margins of the leaves. Radical 

 leaves lanceolate, several inches long, narrowed into a long petiole ; stem-leaves 

 small and distant. Involucral bracts in many rows, spreading to about ^in. 

 diameter, the white petal-like laminse broadly ovate, the inner ones ^in. long* on 

 very short claws, the outer ones shorter and sessile. Florets numerous. Scales 

 of the receptacle rigid, slightly concave, mucronate. Teeth or awns of the 

 pappus-cup very variable, usually very small.— DC. Prod. vi. 153 ; Gaudieh. in 

 Freyc. Voy. 467 t. 90 (A. spathulatum on the plate); Sweet, Brit. Fl. Gard. t. 48. 



Hab.: Southern Downs. 



