The characterization of indigenous Mexican pecan and other Carya populations will facilitate use for rootstocks and scion breeding and will contribute to pecan culture.

vulnerability assessment of Carya affords the opportunity to evaluate the status of our efforts to collect, characterize and conserve the genetic resources of this valuable nut genus that is native to North America.

Pecan cultivars Alphabetic Search by Cultivar Name 'Desirable' (Nut photo a) (Nut photo b) Orig. by controlled cross (unknown parents) made by C. Forkert, Ocean Springs, Jackson County, MS. Parentage of Forkert's first introduction, 'Dependable', was 'Jewett X 'Success'.

Pecan cultivars Alphabetic Search by Cultivar Name 'Evers' (Nut photo) Seedling tree purchased from J. A. Evans Nursery, Arlington, TX, by W. T. Evers and grown on his farm in Denton County, TX.

Pecan cultivars Alphabetic Search by Cultivar Name 'San Saba Improved' Seedling selection grown from seed of 'San Saba' planted by E. E. Risien, in his orchard on the San Saba River, San Saba County, TX.

C. kweichowensis is reported to have naked buds, but differs from the three other Asian Carya species with naked buds (C. cathayensis, C. hunanensis, and C. tonkinensis) by having glabrous bracts, bracteoles and anthers in the male flowers (Kuang and Li, 1979).

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SUBJECT: Yield Estimation and Voucher Collection in Repository Orchards. During the month of September, tree yield and maturity should be characterized by recording the mean number of nuts per cluster, percent terminals with clusters, and Julian date of 75% shuck split for each tree.. The mean number of nuts per cluster for a tree is obtained by noting the number of nuts in 10 clusters.