Plasticfruits, part 9: A contrary case in Chrysojasminum parkeri (Oleaceae)

Gemini

MY QUESTION

Does Chrysojasminum parkeri have fruits similar to other spp. of Jasminum and Chrysojasminum? Supply full references.

ANSWER FROM GEMINI

Yes, Chrysojasminum parkeri (Dunn) Banfi (syn. Jasminum parkeri Dunn) possesses fruits that are structurally and morphologically typical of both Chrysojasminum and Jasminum s.l.

Fruit Morphology of Chrysojasminum parkeri

Like other members of the tribe Jasmineae, the fruit of C. parkeri is a didymous (two-lobed) berry derived from a bicarpellary, superior ovary.

Key diagnostic features of the fruit in C. parkeri relative to its congeners include:

Structure: It consists of two globose to subglobose carpels joined at the base. As is common across Chrysojasminum (e.g., C. humile, C. fruticans) and Jasminum species, one carpel frequently aborts early in development, causing the mature fruit to appear as a single, solitary globose berry.

Pericarp and Color: The pericarp is fleshy to sub-translucent. Upon ripening, the berries range from translucent greenish-white to dark purple/black, consistent with other alternate-leaved, yellow-flowered jasmines of section Alternifolia (now placed in Chrysojasminum).

Seeds: Each developed carpel contains 1 (rarely 2) erect seed with little to no endosperm.

In summary, despite the dwarf, prostrate, and microphyllous habit of C. parkeri (an adaptation to steep, rocky Himalayan slopes in Himachal Pradesh), its syncarpous, didymous berry morphology shows no structural divergence from other species of Chrysojasminum or Jasminum.

Primary References

• Dunn, S. T. (1920). Decades Kewenses: XCV. Bulletin of Miscellaneous Information (Royal Botanic Gardens, Kew), 1920(2), 69–70.
• Note: Contains the original species description of Jasminum parkeri based on collections by R. N. Parker in the Chamba State, Punjab Himalayas.

• Banfi, E. (2014). Chrysojasminum, a new genus for the yellow-flowered species of Jasminum (Oleaceae). Natural History Sciences, 1(1), 3–6.
• Note: Formally established the genus Chrysojasminum, transferring J. parkeri into C. parkeri (Dunn) Banfi based on phylogenetic, vegetative (alternate leaves), and floral/fruit morphological characters.

• Green, P. S. (1961). Studies in the genus Jasminum I: Section Alternifolia. Notes from the Royal Botanic Garden, Edinburgh, 23(3), 355–384.
• Note: Detailed taxonomic treatment of the alternate-leaved jasmines, outlining carpel development, abortion, and berry morphology across the group including C. parkeri.

• Grohmann, F. (1974). Oleaceae. In: Nasir, E. & Ali, S. I. (Eds.), Flora of West Pakistan, Vol. 59, pp. 1–27. Stewart Herbarium, Gordon College, Rawalpindi.
• Note: Provides key diagnostic descriptions of fruit characters and keys for Himalayan Jasmineae.

Grok

MY QUESTION

Does Chrysojasminum parkeri have fruits similar to other spp. of Jasminum and Chrysojasminum? Supply full references.

ANSWER FROM GROK

Yes, Chrysojasminum parkeri (syn. Jasminum parkeri) produces fruits that are berries, similar in type to those of many other species in Jasminum and Chrysojasminum.⁠Plants.ces.ncsu +1

Fruit Description for C. parkeri

The fruit is a small, ellipsoid berry, 3–4 mm in diameter (or described as <1 inch / translucent greenish-white), hairless (glabrous), and shining/glossy.⁠Flowersofindia

It is non-showy and develops after the yellow tubular flowers, ripening in fall.⁠Plants.ces.ncsu

Sources consistently classify it as a berry.⁠Flowersofindia +1

Comparison to Other Jasminum and Chrysojasminum Species

Chrysojasminum species (separated from Jasminum sect. Alternifolia primarily due to alternate leaves and other traits, but sharing Oleaceae fruit characteristics): Other members like C. fruticans produce small black berries, and C. floridum produces 2-valved black berries. Fruits are fleshy berries typical of the group.⁠Wikipedia +1

Jasminum species (the core genus): Fruits are generally small berries (often black or purplish when ripe), sometimes described as double berries from the two carpels. Examples include Jasminum officinale (rarely seen small berries) and others producing black berries. Some references note drupe-like aspects in certain contexts due to the fleshy pericarp and seed structure in Oleaceae, but the standard term is berry.⁠Plants.ces.ncsu +2

Overall similarity: C. parkeri fruits align well with the genus-typical small, fleshy berries of both Jasminum (often black/purplish) and Chrysojasminum (variable color like black or greenish-white). Differences are mainly in color, size (very small in parkeri), and showiness rather than fundamental structure. The genus split (Banfi 2014) emphasizes vegetative and floral traits over fruit morphology.⁠Sisn.pagepress

Note: Fruits are generally not considered edible and are primarily of ornamental/botanical interest.⁠Evilmadscientist

Full References

• North Carolina State University Plant Toolbox: Chrysojasminum parkeri profile (detailed fruit description as translucent greenish-white berry). (accessed via search results, 2026).⁠Plants.ces.ncsu

• Flowers of India: Detailed morphological description (“Fruit is a berry, ellipsoid, 3-4 mm in diameter, hairless and shining”).

• Banfi, E. (2014). “Chrysojasminum, a new genus for Jasminum sect. Alternifolia (Oleaceae, Jasmineae).” Natural History Sciences 1(1): 3–6. (Taxonomic basis for the genus; available via ResearchGate or pagepress.org).⁠Sisn.pagepress

• Additional supporting sources: POWO (Plants of the World Online), Wikipedia entries for related species, and horticultural sites confirming berry fruits across the group.⁠Wikipedia
• This is based on consistent descriptions from botanical and horticultural sources. For primary literature on fruit anatomy, refer to the Banfi paper and Oleaceae revisions.

Citedplants.ces.ncsu.edu·flowersofindia.net