Читать книгу The Grapes of New York - U. P. Hedrick - Страница 35

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1. Bailey, Gray’s Syn. Fl., 1:424. 1897. V. cordifolia, var. Helleri. 2. Viala and Ravaz, Am. Vines, 1903:79. V. cordifolia var.

Vitis cordifolia helleri is first mentioned by Bailey in 1897. It differs from the ordinary forms of Cordifolia in having more circular leaves without the lanceolate point. Viala and Ravaz state that such forms are found in clay soils. Bailey refers to it as an upland south-Texas form found at altitudes of from 1600 to 2000 feet.