266 
Composite. 
70- Ls unequal; the outer (often withered by the time of 
flowering) broader, oval, rather obtuse, or lanceolate- 
subacute; the inner elliptic-lanceolate or lanceolate, 
acuminate,sinuate-dentate,gen.with large, acuminate 
teeth directed forwards, with an insensible and long 
attenuation at the base. Branches more or less spread¬ 
ing, with scales in the upper portion. Caul, ls long, 
narrow. Recalling the Glauca! but invol. ls more acute. 
H. saxatile Schl.!, H. rupestre Schl.! Gaud.! Rap.! not 
AIL, H. oxydon Fr., H. petrseum Ileg. —b . hymenophyllum 
Fr.! Ls glabr., thinner, distinctly broader, less toothed; 
very like II. caesium.—Rocky places in the Alp. and 
subalp.; G. T. W. Y. B. 0. U.; b. Yaud, Freibg., Bern. 7 
Trachselianum Christener! 1427. 
— Ls oblong (gen. narrower than in H. murorum), shortly 
narrowed at the base, toothed or (v. laciniatum Heg.) 
sometimes pinnatifid. Branches, wdien existing, spread¬ 
ing little or almost erect. Habit of H. murorum or 
H. preecox, but stem gen. lower, few-headed, often glabr. 
and leafless; branches more erect, stiff, often arched 
and longer; invol. larger, more swollen, villous, gland¬ 
less. H. csesioides Arv.-Touv.—b. Bionii Grml. (csesium- 
oligocephalum Grml.*) H. subincisum Arv.-Touv. saltern 
p.) Ls spotted, with broad bases, styles yellow; very 
nearly approaching H. prsecox.—Alp. and subalp.; not 
common; G. \V. Y. 0. U.; indicated also on the Creux 
du Yan; b. Sion. 6 caesium Fr.! 1428. 
71 (68). Stem leafless or with 1—2 ls . . . . 72 
— Stem bearing 3—several ls. (Rad. ls gen. more or less 
narrowed at the base) ...... 74 
72. Rad. ls insensibly narrowed at the base. Comp. H. 
atratum. 50. 
— Rad. ls with truncate base, or rounded or slightly cor¬ 
date, rarely shortly narrowed. Type of H.murorum 73 
73. Ls glaucous, gen. spotted, glabr. above, or, if 
hairy, the hairs are longer and stiffer than in 
H. murorum; pi. otherwise very like this last. H. glau- 
cinum (Jord.!) Grml., H. fragile Fr., H. lasiophyllum 
God.! not Koch, H, Pollichiae Schultz bip.! H. Lingen- 
felderi Schultz bip. Lagg\ exs.!, H. murorum plumbeum 
Grisb. Rchb.b. cinerascens Jord.! Ls covered above 
with numerous long, stiff, bristle-like hairs; resembling 
H. lasiophyllum Koch. - c. Verloti Jord. (pilosissimum 
Fr. p. Grml.) Rad. ls rather narrowed at the base, gen. 
sinuate-dentate with acute teeth, and petiole bearded 
*) On H. oligocephalum Arv.-Touv. see N. Beitr. Ill, 16. 
