116 THE JOURNAL OF BOTANY 
weakly-ringed pores; st. 1. not — — ir in ~ 
upper part. Wood-cylinder of the r brow 
Tufts green, yellowish, rose-red, ‘abt never 
v. S. in Wils. 
6. Br. 1. of the spreading branches when dry imbricate and 
with rounded-truncate apex; on the outer surface in the 
always non-fibrillose. Wood-cylinder of stem always red- 
rown. Tufts usually a characteristic uniform a 
more rarely in the upper part pale sie = gree 
5. aan Klinggr. 
7. Br. l. when dry entirely without ies Gents closely 
imbricate; st. 1. usually with numerous fibrils, more 
rarely non-fibrillose; superficial laye of stem cortex 
usually without pores; wood-cylinder a a red 
7. Br. 1. when dry with a distinct metallic lustre, imbricate or 
curved erecto-patent to squarrose; st. 1. with or without 
fibrils ; superficial layer of stem cortex with or without 
pores ; ne — of stem —— ee or red 
to dark pur ; 
8. St. 1. in the Leanne dseoldped slant with a pees ‘ti 
cate and toothed only slightly elongated apex, with a 
narrower or wider margin, Nap is always widened below 
. S. acutifolium Russ. & Warnst. 
8. St. 1. large, generally soe moraines margins, prolonged 
omew t long, truncate and toothed a 
with incurved ring, as in S. subnitens. Border to 
near the leaf-base narrow and then suddenly distinctly 
widened; hyaline cells generally with numerous fi 2 s 
as far as the leaf-base. lants more robust than 
strongest forms of S. acutifolium.) viii. S. tenerum Warns. 
9. Br. 1. when dry (especially in the capitulum) almost always 
distinctly in five rows and curved erecto-patent, as in 
S. Warnstorfii; st. 1. from a broad base distinctly iso- 
sceles-triangular, with or without fibrils; cortical gi 
of stem with scattered bores wood-cylinder not r 
green or yellowish £28, quinguefarium Wamnst. 
9. Br. 1. when dry i Saahcinkie, rarely erecto-patent to squarrose ; 
st. 1. large, with undulate margin and elongated broadly 
truncate apex, usually non- ie piriiiess; rarely with fibrils ; 
hyaline cells several times divided by cross walls ; wood- 
cylinder usually dark purple . x. S.subnitens faa & Warnst. 
10. Stem cortex from the usually reddish or red wood-cylinder 
always clearly differentiated, with its cell-walls not or but 
little thickened. St. 1. large, lingulate, fimbriate on the 
broad rounded apex, with narrow border reaching to the 
base and remaining of equal width throughout ; membrane 
of the hyaline cells in the upper part reabsorbed on both 
sides of the leaf and non-fibrillose ; br. 1. usually with the 
