NortH Haven SAnpD PLatns 619 
Explanation of Plates 
PLATE 23 
a. Tufts of Andropogon scoparius at North Haven. Most of the trees are black 
oaks ( Quercus velutina). 
4. A patch of Baptisia tinctoria at Montowese. Scattered about are plants of 
Lespedeza capitata and Asclepias Syriaca, while in the foreground the ground is covered 
with young seedlings of Zrichostema dichotomum and Sporobolus vaginaeflorus. 
PLATE 24 
a. General view at North Haven, showing black oaks ( Quercus velutina) grow- 
ing in the sand. 
6. A mound of milkweeds (Asclepias Syriaca) at Montowese. Between the plants 
are young seedlings of Sporobolus vaginaeflorus. The mound is about two feet higher 
than the level of the surrounding sand. 
PLATE 25 
a. A carpet of Sarothra gentianotdes at North Haven, A red cedar stands in the 
foreground at the left and in the left middle distance may be seen a crescent-shaped 
mound of Aronia arbutifolia. nthe middle distance at the right is a bunch of Andro- 
pogon furcatus. 
6. View at Montowese showing how the sand has been blown away leaving the 
Toots exposed. The mound is four or five feet higher than the level of the surround- 
ing sand and the vegetation is red cedar (Juniperus Virginiana), black oak ( Quercus 
velutina) and poison ivy (Rhus radicans). 
¢. Red cedar (Juniperus Virginiana) at North Haven, showing the effects of 
winds and storms in blowing and washing away the sand and exposing the roots. 
PLATE 26 
@. Transverse section of leaf of Polygonella articulata, showing epidermal layer 
of water-cells and central water-holding tissue. The assimilating cells occupy the space 
between the epidermal layer and the central tissue. as, assimilating tissue; g, glandu- 
lar cell, x<-70. | 
6. Transverse section of the median portion of the leaf of Carex Muhlenbergit, show - 
ang the strands of water-tissue inside the leaf. qw, water-tissue; m, mestome bundle ; 
st, Stereome strand. x 36. 
¢. Portion of epidermal layer from leaf of Jonactis linaritfolius showing peculiar 
thickening of the cuticle and a protected stoma. ce, cuticle; s, stoma; /, projection 
of the cuticle Showing opening into cell. >< 325. 
@. Transverse section of leaf of Cyperus filiculmis showing water-cells on upper 
Surface and tannin ducts, i, watee-colls; 4, tencin darts. |< 7 
¢. Cross-section of niedian portion of leaf of Sytherisma sanguinatts. ¢, epider- 
mal layer of water-cells supported over midrib by about three others of similar tissue ; 
st, Stereome ;_ m, mestome bundles; 4, hairs, >< 70. 
J. Transverse section of leaf of Stenophylius capillaris, w, water-cells of upper 
Surface ; s¢, stereome strands; s, stoma. > 175. 
ae Tidateiee bection' ot tha median portion of a leaf of Andropogon scoparius. 
%, water-cells of epidermal layer ; m, mestome bundles. > 70. 
4. Hairs from leaf of Helianthemum majus. X70. 
