Research source
Cobia (1973) — historical Argentea Picta, USPP3,307
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.
This source record is live while its research review continues. Bibliographic details and interpretations may change as the evidence is checked.
Citation
Citation details are still being assembled.
Barnell L. Cobia. Milkweed Plant. United States Plant Patent 3,307, issued 20 February 1973; filed 18 May 1971.
What this source documents
The patent describes a historical selection with green-centred leaves, pale borders, waxy streaks and patches, and persistent reddish colour in young growth. It reports a sport on an unnamed selection derived from Verna Jeanette and repeated stem-cutting propagation. Its flowers include irregular parts and mixtures of flower-part counts.
Reading the evidence
These are historical specimens and nursery observations. They do not authenticate newer plants sold under the name or establish controlled care recommendations. One complete photographic sheet shows the plant and flower views.
Photographic sheet: Original PDF page 1; specification: printed columns 1–6 / PDF pages 2–4.
Read the patent record