Lespedeza procumbens Michx. A close crownformer.
Lespedeza violacea (L.) Pars. A long tap-root and close crown, sending up from 10 to 20 annual shoots.
Lespedeza hirta (L.) Ell. A crownformer.
Meibomia pauciflora (Nutt.) Kuntze. A rhizomatous crownformer. The rhizomes are slender, a foot or more in length, and branching. At the point of emergence there is usually a cluster of annual stems.
Thalictrum purpurascens L. A crownformer.
Coreopsis tripteria L. Rhizome composed of annual segments which are about 1 inch in length.
Epigaea repens L. Rhizomes long and slender, close to the surface of the ground.
Cypripedium acaule Ait. Rhizome 2 or 3 in. long, sending out numerous strong roots. The annual growth in length is very small. In one specimen examined the growth of four years amounted to only 6 lines.
Waldsteinia fragarioides (Michx.) Tratt. Rhizome 4 to 12 in. long, slender. Lateral branches numerous.
Plantago cordata Lam. An oblique rhizome of unique habit. The rhizomes of large plants are ½ to ¾ in. thick, and are solid for 2 or 3 in., but back of this the center rots away, leaving a shell which splits up to the base. In small plants it splits but once, forming a flat or slightly incurved ribbon. This becomes rounded, and seems to perform the function of a root. It, however, dies off gradually at the posterior parts. In fig. 1 the split portion is still united near the middle of one of the specimens, and a portion of the posterior end is dead. The root-like portion of the rhizome is much longer than the true rhizome.