verticillate

1 Most of the species are North American herbs, having opposite, alternate, or verticillate leaves.

2 Leaves 1 to 2 in. long, very sharply acute, pale green color, spreading, 4-sided, straight, rigid, slightly glaucous beneath; branches horizontal; branchlets remotely verticillate, numerous, drooping, with light-colored bark.

3 Growth of wood and fruit emanating from the nodes; buds, branchlets and cones, therefore, in verticillate association.

4 Flowers pink, verticillate, in opposite clusters around the stem, with several linear and hairy involucres at the base of each cluster.

5 The panicle in Sporobolus coromandelianus is pyramidal and the branches are all verticillate, the lower being longer than the upper.

6 When the leaves are verticillate and numerous, and they become coherent by their margins, they form a foliaceous tube around the stem.

7 The capsule may open by two, three, or four valves,—or by pores; the seeds, generally numerous, are sometimes solitary, and the leaves may be alternate, opposite, or verticillate.

8 Flowers terminal, white, verticillate, with the characteristics of the mint family.

9 Cells of the same number as the styles, verticillate, with solitary seeds.

10 Displacement of the parts of the flower from elongation of the receptacle is a not infrequent teratological occurrence, resulting sometimes in the conversion of the verticillate into the spiral arrangement.

11 This arrangement may be thus formularised: 6 7 8 9 10 1 2 3 4 5 In the verticillate or simultaneous arrangement of leaves the case is somewhat different.

1 轮生的

cyclic whorled whorl