44 . Rhodora [Mancti 
made in nurseries. When the reactions of a series of species are 
tabulated in this manner, the relations between them are brought 
out clearly, as shown in the following table. 
TaBe III. Som ACIDITIES or ERICACEAE AND RELATED PLANTS. 
Specific Acidities 
30 
300 . 100 NÉS 1 
Medi- Sub- Minim- Neu- 
acid acid acid tral 
PvROLOIDEAE 
Chimaphila umbellata (L.) Nutt........... - X. X NF « - 
Moneses uniflora (L.) Gray............... X 5 © AES - 
et euer - x o x - - 
E. E var. obtusata Turez....... x Xx ^x 2-34 - 
"ANN REB eee is - *-c x E - 
"5... éhlorentha Bwarts................ - - X pU. 
T MR EE. uu uiscera - X x : 3 - 
vim | er so - - - - = X 
Ü E var. incarnata (Fisch.) 
a a OR E RN - - - 
ERICOIDEAE 
Ledum groenlandicum Oeder.............. X x x A - 
Rhododendron canadense (L.) B. S. P. (Rho- 
(00 RON RS Ss eee aes x X X n - - 
Rhododendron lapponieum (L.) Wahl...... X x - - =- 0 
Loiseleuria procumbens (L.) Desv.......... X M - á- - 
Kalmia polifolia Wang................... X x - n - - 
give RS aa X x x B - 
Phyllodoce coerulea (L.) Babington........ A X - kors - 
Cassiope hypnoides (L.) D. Don (Harriman- 
ella Coville) Lo Cun Lh ro RAS X x - poco - 
Andromeda glaucophylla Link............ X Ac. E - 
Chamaedaphne calyculata (L.) Moench.... X x X E. - 
bo b. o v TWECOPR C MEOS x > ead nr - - 
Gaultheria procumbens L............... IUe "i * - - 
Arctostaphylos alpina (L.) Spreng ......... X x - WS P o 
VACCINOIDEAE 
Chiogenes hispidula (L.) T. & G.......... X x x E ox 
- Vaccinium pennsylvanicum Lam. var. an- 
gustifolium (Ait.) Gray................ A x x Bx - 
- Vaccinium canadense Kalm............... x X eo € - 
i I Bec a n o r nA X x - - = - 
"T caespitosum Michx............. x A CR - - m 
d Vitis-Idaea L. var. minus Lodd.. X x - n - ‘e 
Se eg, g OOA X - - - - 
g E var. intermedium Gray X - - - >- 
DIAPENSIACEAE 
Diapensia lapponica L.................... X x oe - - - 
EMPETRACEAE 
Empetrum nigrum L............0........ X x 
ie atropurpureum Fern. & Wieg. 
(E. nigrum var. andinum of Gray's Man.) X X - - - 
