■);-.? 



COMMON CANADIAN WILD PIjANTS. 



S. Aaiilc'uiiiin. Fruit-dots elongated (rarely curved), on veins on ttie 

 back of the pinnules, oblique to the miilrib, but oiil)/ on the njjper 

 side of the jia/iCr.irely attached tobotli sides). Indusiurn attached 

 to the vein by one'edge, the other edge free. Veins free. 



I'.. Woodwardiii. Fruit-dots elongated, on cross-veins parallel to the 

 m/rfrib, forming a chain-like row on each side of the latter. In- 

 dnslum as in the last. Veins retieidated. 



7. .Scoloiirii'ilriiiin. Fruit-dots elongated, oce«»"j7«,7 2« pairs on coil- 

 tigvous veinletSj the free edges of the two Indusia facing each 

 other, so that the sori appear to be single, with an indusinm split 

 down the centre. Veins free. Frond simple, ribbon-shaped, about 

 an inch broad, generally wavy-margined. 



S. Cniuptoso'i-us. Fruit elongated, those near the base of the midrib 

 double, as in Scolopendrium ; others single, as in Asplenium. 

 Fronds simple, J to J of an Inch wide at the heart-shaped hase, 

 and tapering into a long and narrow point; growing In tufts on 

 limestone rocks, and commonly rooting at the tip of the frond, 

 like a runner. Veins reticulated. 



fi. Plicgop'terls. Fruit-dots roundish, on the back (not at the apex) of 

 the veinlet, rather small. Jndusium obsolete or nonet Veins free. 

 Fronds triangular in outline, in onesi>eciestwice-piiinatifid, with 

 a winged rhacliis, and in the other in three petioled spreading 

 divisions, the divLslons once- or twice-pinnate. 



10. .^Kpkl'iiiiii. Fruit-dots round. Indusiurn evident;, flat, orbicular 



or kidney-shaped, lixed by tlie centre, opening all round the mar- 

 gin. Veins free. Generally rather large Ferns, from once- to 

 thrice pinnate. (See Fig. 2G4.) 



11. Cystop'tcris. Fruit-dots round. Indusiurn not depressed in the 



centre, but rather raised, attached to the frond not by the centre, 

 but by the edge partly under the fruit-dot, and generally breaking 

 away on the side towards the apex of the pinule, and becoming 

 i)jpfle.\ed as the sporangia ripen. Fronds slender and delicate, 

 twice- or thrice-pinnate. 



12. Strntliliip'terls. Fertile frond much contracted and altogether 



unlike the sterile ones, the latter very large and growing in a 

 cluster with the shorter fertile one in the centre. Kootstock very 

 thick and scaly. Fertile fronds simply pinnate, the margins of 

 the pinnae rolled backward so iis to form a hollow tube containing 

 the crowded sporangia. Very common in low grounds. 



13. Oiioclc'a. Fertile and sterile fronds unlike. (See Figs. 206, 207, 



268, 269, and accompanying description. ) 



14. Wood'sla. Small ferns with free veins. Sori round. Indusiurn 



very thin arid delicate, attaclied by its base all round under tlie 

 Boris, the top at length bursting into more or less naiTow seg- 

 ments. 



