Trichinium .] C. AMARANTACEdL 1225 
Spikes ovoid or shortly cylindrical, 2iu. diameter. Bracts transparent. 
Leaves linear 7. 2'. macrocephalum. 
Spikes globular or rarely ovoid. Perianth-segments rather broad, the 
dorsal hairs very short 8- T . corynibosum. 
Semes III. Slhodostachya. — Spikes globular ovoid or rarely cylindrical, 1 to 2in. 
diameter, terminating simple or rarely branched stems. Perianth straight, pink or red, the inner 
segments tvoolly inside towards the base. 
Spikes 1J t0 2in. diameter. 
Perianth-segments very rigid with short narrow tips. Stems erect. 
Spikes about ljin. diameter. 
Spikes at length elongated and cylindrical 9. T. exaltatum. 
Sp'kes globular or shorter than broad 10. 2'. semilanatuvi. 
Series IV Polycephala. — Stems mostly branched or rarely some of them long decumbent 
and simple, glabrous or with crisped woolly hairs. Spikes mostly globular, j to 1 in. diameter. 
Inner perianth-segments nearly glabrous inside. Staminal cup surrounded 
by long straight hairs. 
Leaves linear-filiform. Perianth straight. Stamens 3 or 4 perfect 
the filaments forming at the base a complete cup or ring. 
Perennial with a thick rootstock. Spikes about lin. diameter . . 12. T.fusiforme. 
Annual. Spikes about Jin. diameter 13. T. gracile. 
Series V. Squamigera. — Spikes globular or cylindrical, J to 1 in. diameter. Staminal 
cup with transparent scale-like teeth or lobes between the filaments ( wanting in all the other 
series). Leaves narrow. 
Annual with slender branching stems of 1ft. or more. Spikes cylindrical 
about Jin. diameter 14. T. calostachyum. 
Series VI. Parviflora.— Spikes globular, ovoid or cylindrical, J fo Jin. diameter. 
Perennial. Bracts and bracteoles nearly as long as the perianth and very 
conspicuous. 
Young shoots woolly. Leaves glabrous, broad. Spikes ovoid. Per- 
ianth-Segments glabrous inside 15. T. arvuides. 
1. T. obovatum (obovate), Gaudich. in Freyc. Yoy. But. 445 t. 49; Benth. 
FI. Austr. v. 220. An erect undershrub, from under 1ft. to 3 or even 4ft. high, 
paniculately branched sometimes from the base sometimes at the top only, 
clothed with a soft dense stellate tomentum, intermixed occasionally with 
long denticulate hairs. Leaves obovate or oblong, very obtuse or rarely 
mucronate-acute, contracted into a petiole rather long in the lower leaves, 
short in the upper ones, the larger ones attaining 2in. but mostly under 
lin. long. Spikes nearly globular or scarcely ovoid, to fin. diameter, 
sessile or shortly pedunculate, in terminal corymbose panicles, which are 
sometimes compact and leafless, sometimes more spreading and leafy at the 
base. Bracts and bracteoles usually rather brown, obtuse or shortly mucro- 
nate-acute, glabrous or nearly so, under 2 lines long. Perianth 3 to 4 lines 
in the typical form, the tube about f line, segments rigid, plumose with long 
white hairs, the glabrous tips short obtuse and denticulate in the outer 
segments, the inner ones shorter and more acute, glabrous inside. Stamens 
unequal, 3 or 4 perfect, filaments dilated downwards, scarcely united above 
the perianth-tube, surrounded by a ring of long articulate hairs. Ovary 
usually hairy on the top. Style excentrical. — Moq. in DC. Prod. xiii. ii. 
286; Ptilotus obovatus, F. v. M. Fragm. vi. 228; Key Sys. V. PI. Fig. 35; 
T. iitcanum, Moq. l.c. 285 not of R. Br. ; T. sessilifolium, Lindl. in Mitch. 
Three Exped. ii. 13 ; Moq. l.c. 284 ; T. lanatum, Lindl. in Mitch. Three 
Exped. ii. 123 ; Moq. l.c. 285 ; Ptilotus Lindleyi, F. v. M. Fragm. vi. 233 
(from the synonym) ; P. atriplicifolium , A. Cunn. in Moq. l.c. 286, T. 
rariabile, F. v. M. in Linnete xxv. 436 ; GomotricJic tomentosa, Turcz. in 
Bull. Soc. Imp. Nat. Mosq., 1849, 37 (corrected to (loniotriche, l.c. 1852, ii. 181). 
Hab.: Narran River, Mitchell. Common on the inland downs. 
