1909] Penhallow,— The Habitat of Rhodora 173 
EXPLANATION OF PLATES 80 AND 81. 
Fig. 1. Transverse section, showing the rather faintly marked annual 
ring. X 40. 
Fig. 2. Radial section, showing structure of a typical ray. X 200. 
Fig. 3. Tangential section. X 200. 
Fig. 4. Radial section, showing character of bordered pits and absence of 
Bars of Santo. X 500. 
Fig. 5. Radial section, showing trabeculae. X 200. 
Fig. 6. Radial section, showing mucilage-filled tracheids. X 120. 
Fig. 7. Transverse section, showing a broad band of traumatic tissue. X 40. 
Fig. 8. Transverse section, showing three of the traumatic canals, enlarged. 
Xx 120. 
Fig. 9. Radial section, showing mucilage-spaces. X 40. 
Fig. 10. Radial section through the traumatic tissue showing the much 
thickened and pitted walls of the ray-cells in this region. X 200. 
Fig. 11. Tangential section through the margin of the traumatic tissue, 
showing septate tracheids, tangential pits, and thick-walled ray- 
cells. Note the beautiful preservation of the bordered pit. X 500. 
Fig. 12. Tangential section through the wide part of the traumatic band, 
showing the anastomosing mucilage-cavities crossed by the thick- 
walled rays. X 40. 
AN ACCOUNT OF CERTAIN NOTEWORTHY FEATURES 
IN THE HABITAT OF RHODORA. 
D. P. PENHALLOW. 
Fon the enthusiastic collector, a large amount of interest always 
centers in Rhodora, not only because it is one of the most brilliant and 
fascinating of our early flowers, but also because it is commonly 
associated with bogs, of which it is generally held to be typical. For 
these reasons, any deviation from its recognized habit at once attracts 
attention and calls for some explanation. During the present spring 
large areas of this species have come under notice, and in some instances 
the size of the shrub and its particular habitat have presented such 
strong deviations from what one is accustomed to, as to suggest the 
importance of placing the principal facts on record. 
At Shelburne, New Hampshire, in the valley of the Androscoggin, 
