HIEKACIUM. 
205 
directed downwai-ds. Petioles usually short. Original 1. roundish. 
— By mountain streams In Aberdeenshire. P. VII. VIII. S. 
20. H. aggrvydtum (Backh.) ; deep green, rt.-l. ovate blunt 
coarsely dentate below floccose beneath when young, st.-l. 1 lan- 
ceolate narrowed at both ends, st. corymhose and floccose at the 
top, ped. ayyreyate, inv. subtruncate below loosely floccose setose 
nearly hairless, phyll. blunt. — JI. bifidum Koch ? — 12 — 20 in. 
high. St. usually simple. Ped. forming a close corymb as in 
H. umhellatum. Heads many. Buds cylindrical. Fl. bright 
yellow or orange. Styles yellow. L. rosulate, persistent; original 
I. nearly round; innermost acutish. Petioles rather winged, 
slightly hairy. St.-l. subsessile. Phyll. adpresaed. — By moun- 
tain streams in the Grampian Mountains. P. VII. VIII. S. 
tt Styles more or less livid. 
21. H. murdrum (L.) ; green, rt.-l. ovate often cordate and 
with large patent or descending teeth below, petioles shaggy, 
st.-l. 0 or 1 stalked and placed high, heads subcorymbose, ^e(^. 
arcuate ascending, inv. thinly clothed floccose setose with few 
hairs, phyll. acuminate erect 'overtopping the glabrous-tipped 
buds, styles livid. — 12 — 18 in. high. Young heads cylindrical. 
L. usually thin. St.-l. ovate-acuminate, often rounded or cor- 
date below. Styles rarely yellowish. — "/3. rotundatum (Backh.) ; 
St. long, often leafless, rt.-l. broadly ovate roimded at both 
ends or cordate below denticulate or eutu'e." — Woods and rocks. 
(3. Canlochan, Forfai-shire. P. VI. VH. E. S. I. 
22. H. cce'sium (Fr.) ; csesious or dull green, rt.-l. ovate or 
lanceolate rounded or narrowed below irregadarly dentate-serrate 
with patent or ascending teeth, petioles slender, st.-l. 0 or 1 
placed low, st. few-headed with straiyht-based ped., inv. rounded 
heloiv floccose haiiy slightly setose, ^j^f/Z/. hhmtish inner ones 
acute incumbent, styles slightly livid. — H. murnrum Sm., E. B. 
2082.— 12— 18 in. high. Young heads roundish. Fl. bright 
yellow. Phj'll. not cuspidate; inner veiy slender, pointed. Root- 
stock long. L. nearly glabrous above, coriaceous, not fringed 
with coarse hairs; innermost acute. St.-l. not stalked, nar- 
rowed below. — H. obtiisifolium (Backh.) ; yellowish green, ori- 
ginal rt.-l. ovate rounded at both ends entire, petioles densely 
villose, st.-l. 1 stalked ovate-lanceolate, inv. ventricose becoming 
tnmcate below, phyll. acuminate, buds pilose at the tip ; is pro- 
bably a variety, and is found at Clova. — Mountains. P. VII. 
VEIL E. S. I. 
23. H.f.occ6mm (Backh.) ; ashy gi-een, rt.-l. ovate or oval 
blunt or acutish \vith small teeth below Jloccose on both sides 
narrowed into long petioles, st.-l. few larye ^-clasping, st. svih- 
covyvixhoaQ Jtoccose tnroughout, ped. straight-based, inv. ovate 
