RELATION OF LEAF STRUCTURE TO PHYSICAL FACTORS 41 



Solidago missouriensis (sub-type): diplophyll 325/4; epidermis 

 30 /A; cuticle 5/4; chlorenchym (265/4) 2-4 close rows prolate 

 palisade cells 30-50/4, next to either epidermis (usually fewer next 

 to lower) ; central water-storage cells 27% of chlorenchym. 



Solidago extraria. 



Solidago oreophila: leaf 250/4. 



Solidago decumbens: leaf 300 p. 



Solidago multiradiata. 



Anogra pallida: leaf 375 p.. 



Kuhniastera purpurea. 



Erigeron glandulosus: leaf 350 p, ; epidermis 40 p. ; cuticle 10 p. 



Paronychia pulvinata: leaf 350 p. ; cuticle 3 p. 



Oreoxis humilus: leaf 400 p.; epidermis 50/4; cells 50-75 ju. 



Oreoxis alpina: leaf 375 /<,; epidermis 40/4; cuticle 7/4; 2 rows 

 palisade cells next to either epidermis 50-75 p.. 



MERTENSIA LINEARIS: diplophyll 350/11; epidermis 45/4; cuticle 

 5/4; chlorenchym (260/1.) 2-3 rows prolate palisade cells 25-50/4, 

 next to either epidermis ; central subglobose to oblate water-storage 

 cells 40% of chlorenchym. (Plate IV, fig. 10.) 



Plant ago purshii: leaf 275 p.; epidermis 35 p.; cuticle 3 p.. 



Argemone intermedia: leaf 300/4; cuticle 3/1; water-tissue 25% 

 of chlorenchym. 



Mertensia laterinora: epidermis 25 p. ; cuticle 3 p.. 



Mertensia alpina: epidermis 25 p.; cuticle 3 p.. 



Oreocarya virgata: epidermis 35 p.. 



Oreocarya fruticosa: epidermis 25 p. ; cuticle 8 p.. 



Erigeron canus: water-storage tissue 25% of chlorenchym. 



Erigeron nagellaris (subtype): leaf 225/1,; epidermis 25/4; 

 cuticle 5 p. ; water-storage tissue 30% of chlorenchym. 



Erigeron pumilus: leaf 250 p. ; epidermis 35 p. ; cuticle 7 p. 



Lithospermum linearifolium (sub-type): leaf 350/4; epidermis 

 25/1; cuticle thin; chlorenchym (300/4) 2 rows prolate palisade 

 cells 50/4 next to upper epidermis, I row next to lower epidermis; 

 intermediate oblate water-storage cells 50% of chlorenchym. 



Lithospermum paruinorum. 



Onagra strigosa (sub-type): leaf 325/4; epidermis 25/4; cuticle 

 thin; chlorenchym (275/4) 2-3 rows prolate cells 60-75/4 next to 

 upper epidermis, I row 40-50/4 next to lower epidermis; central 

 irregular cells. 



