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Cobaea, or any morning glory or nasturtium relative, is sown in May in the greenhouse or under lights.

Todd Forrest, vice president of horticulture at the New York Botanical Garden, said he was astonished to find on the High Line plantings of a wildflower from Arkansas named Penstemon cobaea.

Pentstemon.—The popular garden varieties have sprung from P. Hartwegii and P. Cobaea.

In some cases, however, they are transformed into leaves, like the calyx, and occasionally leaf-buds are developed in their axil They are seldom green, although occasionally that colour is met with, as in some species of Cobaea, Hoya viridiflora, Gonolobus viridiflorus and Pentatropis spiralis.

For instance, the tendril of Cobaea first rises vertically up, with its branches divergent and with the terminal hooks turned outwards; the young shoot at the extremity of the stem is at the same time bent to one side, so as to be out of the way.