336 THE CROWFOOT FAMILY 
the wood-anemony and the Christmas rose, and persist over 
the winter as a reservoir of food upon which buds may feed 
the following spring. Such an elongated subterranean stem 
is called a rootstock or rhizome.t. When, as in the bulbous 
crowfoot, the subterranean base of the stem becomes so much 
gorged with food as to be spheroidal or oblate in form it is 
termed a ‘‘solid bulb” or corm.’ 
Fic. 290.—Vine-bower Clematis (Clematis Vitalba, Crowfoot Family, 
Ranunculacee). A, flower-cluster. B, flower. C, same, cut vertically. 
D, stamen. £, pistils. F, floral diagram. G, fruit. H, base of fruit, 
cut vertically. (LeMaout and Decaisne.)—A somewhat woody climber 
growing 10 m. long; flowers dull white; fruit hoary. Native home, 
Mediterranean Region; cultivated in gardens. 
Turning now to the foliage of our marsh-marigold we find 
the leaves to be of a form very common among seed-plants, 
and comparatively simple although more highly developed 
than the leaves of flax. In a marsh-marigold leaf we may 
distinguish a broadly expanded part, the blade, borne on a 
footstalk or petiole; * which expands again at its base into a 
1 Rhiz-ome < Gr. rhiza, root, because of its root-like appearance. 
?Corm < Gr. kormos, a pollarded tree-trunk. 
* Pet’-i-ole < L. petiolus, a little foot, diminutive of pes, pedis, a 
foot. 
