Sort Reactions or Crertrain Frrns—I 17 
many of the species will be changed. It is hoped, in 
particular, that species which the writer has been unable 
to study fully will be worked up by others. 
Taste I. Cuassirication or Rock Ferns on THE Basis or Sor Reaction 
Soil Reactions 
3S g é| 
3 I : a | 4 
Name No. of 2 3 = = P| Class 
tests s s pceeee ere ay 
a ND Circumneutral 
300 + 100 3010 3+] 1 /8+/10 /30+ 
Cheilanthes lanosa........ 15 Saat) We Seer. el bem, Stee ALS We Pee ea hee hae 
omentosa....| (2) - Se ee eo at ee A 
Pellaea atropurpurea...... 30 Poe peng ac Oe pee GN > SA ee bv Ay C 
labella...... Bae | emcee | fe Cees ead Se ae C 
Cr Stelleri 15 —- |-| - x|X/|xX|xX| - @; 
Phyllitis Scolopendrium ) Sa eee eee foe Cc 
amptosorus rhizophyllus | 50 ale ee Oe ee tO 
Asplenium pinnatifidum.. . x |X| x/|xl-|-[|-|-|-| A 
ebenoides...... TR) Sea a ee eee Cc 
platyneuron. ..| 50 goes Rope, Sg a. Ga pee oP Sr ee ee Cc 
resiliens.......| 15 Se ie a a ed ae De 
Trichomanes.. .| 30 - aie (OS he oo Poe Cc 
NiPId@ cy Ss (2) mote be eee LAR GE mee ee 
Bradleyi....... Sy Ray ees -|-|A 
montanum xo} Xi xX} xi et clo lod A 
: uta-muraria..| 15 Bit bene ee a i ee Sk SG a es DT 
Polypodium vulgare......| 5 i a ee aes gle Ge a > i ae me 2 
polypodioides | 15 by gee ail fg, shes ee Bey ce A eg rye Bane Wales A 
Woodsia glabella.........| 15 = bog + =| eee eet oe be 
AIDS oaks 5 at ee a Se ee 
Ilvensis 25 il eee Se eee ee 
OURDBR is ee ick oo ~ 5 Sao, ea ad. eb. Sy i. Se, A pe. 8] 
Wilix bulbiferas 05500, 30° - ot sol wy oe oe eS Cc 
Tragilie 3 20 hg Pe ae poe ee 
Dryopteris fragrans....... (2) Lt oe Lal ie iE 18 
Totals: Acid soil plants, 7; calcareous soil plants, 18; sum, 25. 
EXPLANATION OF TABLE I 
The names used are those accepted by most present- 
day writers; important synonyms are given in the sub- 
sequent discussion. The number of tests made on each 
