A documented source used to build and check Hoya Library records. This page explains what the source is, what it contributes, and where its limits remain.
United States plant patent1973-02-20
This source record is live while its research review continues. Bibliographic details and interpretations may change as the evidence is checked.
Citation
Barnell L. Cobia. Milkweed Plant (United States Plant Patent 3,306). 1973-02-20. pp. 1–7 (patent cols.1–8 and correction).
United States Plant Patent 3,306 describes Hoya carnosa compacta (cv) Regalis as a sport of Marginalis at Winter Garden, Florida. The distinction combines the curled Compacta habit, pale leaf borders and persistent red-family colouring of several organs. The description reports leaf blades usually 30–70 mm long and 20–45 mm wide, umbels usually containing 20–45 flowers, and flowers usually 12–18 mm across (printed cols.3–6).
The 3 July 1973 Certificate of Correction supplies five instructions affecting the issued text. Corrected readings control; OCR and later copy annotations are navigation aids rather than new historical evidence.
Scope and limits
The original and extraction are filed. The complete two-sheet photographic plate is displayed on the Regalis profile in its published context, with item-specific reproduction review. The patent describes historical material and reports successive stem-cutting propagation. It does not authenticate modern plants or establish optimum cultivation conditions through a controlled comparison.
Evidence scope and limits
Original and separate extraction filed; historical source statements and explicit uncertainties retained.
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Original factual paraphrase and citation; reviewed complete patent-plate facsimiles on exact profiles. No separate open license for isolated photographs is asserted.
