---
kind: "section"
citation: "7 C.F.R. § 201.56-4"
title: "7"
number: "201.56-4"
heading: "Cucurbit family, (Cucurbitaceae)."
url: "https://uscodex.org/cfr/7/201.56-4"
---

# §201.56-4. Cucurbit family, (Cucurbitaceae).


Kinds of seed: Citron, cucumber, West India gherkin, melon, pumpkin, squash, and watermelon.

- (a) **General description.**
  - (1) **Germination habit—** Epigeal dicot.
  - (2) **Food reserves—** Cotyledons which are large and fleshy; they expand, become photosynthetic, and usually persist beyond the seedling stage.
  - (3) **Shoot system—** The hypocotyl elongates and the cotyledons are pulled free of the seed coat, which often adheres to a peg-like appendage at the base of the hypocotyl. The epicotyl usually does not show any development within the test period.
  - (4) **Root system—** A long primary root with numerous secondary roots.
- (b) **Abnormal seedling description.**
  - (1) **Cotyledons—**
    - (i) **Less than half of the original cotyledon tissue remaining attached.**
    - (ii) **Less than half of the original cotyledon tissue free of necrosis or decay.** (Remove any attached seed coats at the end of the test period for evaluation of cotyledons.)
  - (2) **Epicotyl—**
    - (i) **Missing.** (May be assumed to be present if the cotyledons are intact.)
    - (ii) [Reserved]
  - (3) **Hypocotyl—**
    - (i) **Deep open cracks extending into the conducting tissue.**
    - (ii) **Malformed, such as markedly shortened, curled, or thickened.**
  - (4) **Root—**
    - (i) **None.**
    - (ii) **Weak, stubby, or missing primary root, with less than two strong secondary or adventitious roots.**
  - (5) **Seedling—**
    - (i) **One or more essential structures impaired as a result of decay from primary infection.**
    - (ii) **Albino.**

## Notes

### Amendments

[59 FR 64501, Dec. 14, 1994]

### Authority

Authority: 7 U.S.C. 1592.

### Amendments

[59 FR 64501, Dec. 14, 1994]