| GROUP I | STERILE AND FERTILE FRONDS TOTALLY UNLIKE; |
plume-like fronds of a rich green arched above my head. From the midst of the circle which they formed sprang the shorter, dark, rigid fruit-clusters. I was fairly startled by the unexpected beauty and regal bearing of the Ostrich Fern.
This magnificent plant luxuriates especially in the low, rich soil which is subject to an annual overflow from our northern rivers. Its vase-like masses of foliage somewhat suggest the Cinnamon Fern, but the fertile fronds of the Ostrich Fern mature in July, some weeks later than those of its rival. They are dark-green, while those of the Cinnamon Fern are golden-brown. Should there be no fruiting fronds upon the plant, the Ostrich Fern can be distinguished by the free veins with simple veinlets (Plate II, a) of its pinnæ, the veins of the Cinnamon Fern being free and its veinlets forking (Pl. III, a), and by the absence of the tuft of rusty wool at the base of the pinnæ on the under side of the frond.
The Ostrich Fern does so well under cultivation that there is danger lest it crowd out its less aggressive neighbors. It propagates chiefly by means of underground runners. Mr. Robinson describes a specimen which he had planted in his out-door fernery that crawled under a tight board fence and reappeared in the garden of his neighbor, who was greatly astonished and equally delighted so unexpectedly to become the owner of the superb plant.
The Ostrich Fern, like its kinsman the Sensitive Fern, occasionally gives birth to fronds which are midway between its fruiting and its non-fruiting
58
