FAMILIES OF PLANTS 
125 
M achaer ant hera corono pi folia has leaves that are pinnately lobed, 
and Machaeranthera shast&nsis has mostly entire leaves. Both the 
stems and leaves are whitish with very short hairs. 
Machaeranthera viscosa has also been reported in the park. 
Golden rod (Solidago) The true goldenrods are all perennial herbs 
with alternate leaves and rather numerous but small heads of yellow 
flowers, both ray and disk. The bracts of the. involucre are arranged 
in two or more series and the pap¬ 
pus is composed of dull white bristles. 
The nine species that have been identi¬ 
fied in the park may be distinguished 
in the following manner: 
1. Plants smooth or nearly so. 2. 
1. Plants hairy, at least on the upper 
parts. 7. 
2. Leaf blades not triple-veined. 3. 
2. Leaf blades triple-veined. 4. 
3. Plants usually less than a foot high. 
Heads rather large with numerous rays. 
Solidago corymbosa. 
3. Plants usually more than a foot high. 
Heads smaller with 8 to 10 rays. 
Solidago dilatata. 
4. Plants usually less than 16 inches 
high, 5. 
4. Plants usually more than 16 inches 
high. 6. 
5. Stems tufted, often numerous. Soli dago 
eoncinna. 
5. Stems not tufted, often single. Solidago 
mismuriensis . 
6. Leaves broad and sharply toothed. No¬ 
vember golden rod (Solidago scrotina). 
6. Leaves narrower and entire or only spar¬ 
ingly toothed. Solidago elongata. 
7. Plants usually less than a foot high. Solidago nana. 
7. Plants usually more than a foot high. 8. 
8. Leaves entire. Solidago pulcherrim.a. 
8. Leaves toothed, at least the lower ones. Solidago canadensis. 
Oremtrum haydeni is a low plant with basal leaves and leafless 
flowering stems 2 to 4 inches high, each bearing a single head. The 
smooth, nerveless leaves vary from spatula-shaped to narrowly linear 
and are 1 to 3 inches long. The ray flowers are purple and quite 
numerous. 
lonactis alpina is another low plant, but the leaves are equably 
distributed along the stems instead of being basal. The clustered, 
rigid stems are 3 to 6 inches high, and each is terminated by a solitary 
785717°—48-9 
Figure 101. —-Golden rod. Yellow. 
Copyright, J. E. Haynes. 
