968 COMPOSITAE. [ Raoulia. 
mouth. Anthers sagittate at the base, produced into fine tails. Style- 
branches nearly terete, truncate or subcapitate. Achenes oblong. Pappus- 
hairs in 1 or several series, slender or thickened at the tip. 
Taken as a whole, Raoulia is a genus founded more upon habit than upon really 
good and distinctive characters. But it can be easily divided ‘as was first pointed 
out by Hooker and Bentham) into two subgenera distinguished by remarkable 
differences in the pappus-hairs. The fir8t of these, characterized by possessing com- 
paratively few pappus-hairs, which are rigid and thickened at the top, had the name 
of Imbricaria bestowed upon it by Bentham; but, unfortunately, the appellation had 
already been used. The other subgenus, called by Bentham Leptopappus, has much 
more numerous and much thinner and softer pappus-hairs. During recent years the 
whole genus has been carefully reviewed by M. Gustave Beauverd, the well-known 
keeper of the Boissier Herbarium, and as the result of a very complete and pains- 
taking inquiry, published in the “ Bulletin of the Botanical Society of Geneva ” for 
1910-12, we now have a full account of the whole of the species. I have gladly 
availed myself of Beauverd’s work, and with few exceptions have followed the arrange- 
ment of the species adopted by him. I have also adopted his suggestion of the names 
Psychrophyton and Hu-Raoulia for the two primary divisions of the genus. 
Subgenus 1. PSYCHROPHYTON. Pappus- hairs 15-25, in 1 series, compressed, 
thickened towards the top and furnished with clavate papillae. 
* Uninerves. Leaves 1-nerved at the base; acuminate or rounded at the summit. 
Leaves glabrous, spreading, rigid, subulate. Inner involucral bracts 
without white radiating tips = ce ag .. IL. R. subulata. 
Forming large compact masses. Leaves densely imbricate, linear- 
spathulate, upper $ with a dense tuft of hairs concealing the leaf. 
Inner involucral bracts without white radiating tips .. .. 2, BR. eximia. 
Forming compact masses. Leaves densely imbricate, obovate- 
spathulate, upper part clothed on both surfaces with long straight 
hairs. Inner involucral bracts with white radiating tips .. 3. R.mammillaris. 
** Tryuncatae. Leaves 1-nerved at the base; truncate or retuse at the trp. 
Forming compact greenish masses. Leaves densely imbricated, 
linear-oblong, truncate, tip of upper surface clothed with dense 
straight hairs, naked beneath ne iu se .. 4. BR. Goyent. 
Forming compact masses. Leaves densely imbricated, obovate- 
spathulate, upper part clothed on both sides with straight hairs 
concealing the leaves, but extreme tip naked .. Re .. 5. R. rubra. 
Forming compact masses. Leaves densely imbricate, broadly 
cuneate or flabellate, truncate, tip of upper surface clothed with 
dense straight hairs, beneath glabrous and corrugated .. .. 6. R. Buchanan. 
ex Trinerves, Leaves 3-nerved at the base, the lateral nerves weak. 
Forming pulvinate masses 6-12 in. diam. Leaves densely imbricate, 
narrow-obovate, recurved at the apex, upper surface with long 
soft hairs above the middle, under-surface almost wholly covered. 
Inner involucral scales not radiating. Florets 20-40 .. .. 7, R. Loganit. 
Forming compact patches. Leaves densely imbricate, rhomboid- 
spathulate, tips clothed on both surfaces with close tomentum. 
Inner involucral scales with radiating tips. TFlorets 8-15 .. 8. BR. bryoides. 
Branches not closely compacted. Leaves densely imbricate, 
rhomboid-spathulate, larger than those of Rk. bryoides. Heads 
Zin. diam. Florets 20-40 a4 Es af 0 
Leaves spathulate or obovate-oblong, silky-pubescent on both 
surfaces. Heads large, 4-4in. diam. Inner involucral scales 
with long white radiating tips we a sd .. 10. R. Youngit. 
Stems tufted or simple. Leaves }-1in., white and silvery, ovate- 
or lanceolate-subulate. Heads large, 4-3in. diam. Inner in- 
volucral scales with long white radiating tips .. uF a 
Forming bread flattened patches. Leaves ovate, obtuse; upper 
% clothed with silvery tomentum; lower 4 membranous and 
glabrous. Inner involucral scales not white at the tips .. 12, R. Hectori. 
9. RB. Gibbsu. 
ll. BR. grandiflora. 
