Typical Chinese Plum Yew (Cephalotaxus sinensis var. sinensis)
Cephalotaxus sinensis var. sinensis: Chinese Plum Yew Characteristics
Spanning a wide distribution across the temperate and subtropical zones of China, Cephalotaxus sinensis var. sinensis highlights the diversity of ancient conifers. This plant grows in broadleaf, coniferous, and mixed forests, often on limestone soils. It forms a crucial component of the forest understory, adapting well to shady conditions.
Taxonomy
- ∟ царство Plantae
- ∟ division Tracheophytes
- ∟ subdivision Spermatophytes (Seed plants)
- ∟ superclass Gymnospermae
- ∟ division Pinophyta
- ∟ subclass Cupressidae
- ∟ order Cupressales (Cypresses and junipers)
- ∟ family Cephalotaxaceae (Plum-yews family)
- ∟ genus Cephalotaxus (Plum yew)
- ∟ species Cephalotaxus sinensis (Chinese Plum Yew)
- ∟ variety Cephalotaxus sinensis var. sinensis (Typical Chinese Plum Yew)
Morphology
Developing as a shrub or a medium-sized tree, this conifer can grow up to fifteen meters tall. The bark is grey-brown or reddish-brown, exfoliating in irregular flakes. The needles are straight or slightly curved, measuring up to five centimeters long, with a dark green upper surface and two broad, white stomatal bands below.
The reproductive organs have the following attributes:
- Microsporangiate strobili: Organized in axillary heads of six to eight individual cones.
- Megasporangiate strobili: Borne in small groups, with only one or two developing into mature seeds.
- Fleshy aril: Envelopes the seed completely, changing from green to red or brownish-purple when ripe.
Applications
The foliage and seeds are rich in bioactive alkaloids, making them highly valuable in pharmaceutical research. Extracts like homoharringtonine are used in clinical oncology. The seeds also contain high-quality technical oils used for industrial purposes, while the plant itself is occasionally cultivated as an ornamental shrub.
Interesting facts
Although the seeds contain toxic compounds, they are consumed and spread by small forest mammals and birds. The plant shows a remarkable tolerance to limestone substrates, often colonizing karst landscapes where other conifers struggle. Because it is the typical variety, its scientific name contains the repeated term sinensis, meaning 'from China'.
Geography of distribution
- China
Sources
- POWO: Plants of the World Online
- WFO: World Flora Online
- GBIF: Global Biodiversity Information Facility
Technical Information
External Databases: GBIF