ranon.2011's picture

Plant - Hottentot Fig

Observed: 17th December 2012 By: ranon.2011ranon.2011’s reputation in Plantsranon.2011’s reputation in Plantsranon.2011’s reputation in Plantsranon.2011’s reputation in Plants
17.12.2012 Plant - Hottentot Fig
Description:

An unusual sunny and warm day, added to by the unseasonable blooming of this plant.

Identifications
Species interactions

No interactions present.

Comments

derrick.rowe's picture

A pertinent abstract.

http://www.ncbi.nlm.nih.gov/pubmed/21708643
Hybridization and introgression in Carpobrotus spp. (Aizoaceae) in California. I. Morphological evidence.
Albert M, D'Antonio C, Schierenbeck K.
Abstract

Individuals of the invasive non-native plant species Carpobrotus edulis, its native or naturalized congener C. chilensis, and putative hybrids are found throughout coastal California. This study characterized morphological variation within the genus and assessed the extent of hybridization and direction of introgression between C. edulis and C. chilensis. Twelve randomly selected Carpobrotus individuals from each of 49 sample locations were classified as "C. edulis," "C. chilensis," or one of three intermediate morphotype classes, and compared for clonal, vegetative, and fruit characters. Univariate comparisons showed that C. edulis individuals had deeper mats with more cover within the mat boundary, longer, wider, more serrate leaves, and wider fruits with more carpels than intermediate and C. chilensis morphotype classes. Carpobrotus edulis and intermediates had more lateral branches than did C. chilensis, suggesting that hybrids tend to vary toward C. edulis. Discriminant function analysis (DFA) identified the following characters as discriminating significantly among Carpobrotus groups: leaf length, leaf width, leaf length/width, number of lateral branches, number of carpels, and fruit diameter. Using these characters, DFA correctly classified 98% of apparently pure C. edulis and C. chilensis, but only 76% of all Carpobrotus individuals when putative hybrids were included. Principal components analysis showed that C. edulis and C. chilensis cluster into distinct morphotypes, but that hybrids overlap with both groups, particularly with C. edulis. The genus Carpobrotus in California resembles a large hybrid swarm, with putative hybrids forming a large portion of the overall population and tending to vary toward C. edulis.

derrick.rowe's picture

Anomalous

Yet from the photographs of Carpobrotus currently published in Ispot (most have purple flowers) it appears that C. edulis may be the species being swamped in the UK. I wonder if species other than Carpobrotus chilensis may be adding their genes to the probable hybrid swarms.

derrick.rowe's picture

Flower colour

Incidentally, the flower certainly indicates C. edulis or a close hybrid.

ranon.2011's picture

There are many purple ones as

There are many purple ones as well that usually are in flower mid-year although the yellows are increasing in number.