Oxalis elegans.

looks like Oxalis oregana.

(via garden-artistry)

Oxalis enneaphylla (D.C. Parda? i.702) collected on the Falkland Islands.

Oxalis decaphylla (Hutchins 9837), from Catron County NM.

Oxalis simplicifolia growing on a cliff at Ua Huka, Marquesas Islands, shows distinctive simple leaves, flowers and fruits. (Photo by Steve Perlman)

http://smithsonianscience.org/2011/07/marquesas-islands-in-french-polynesia-yield-18-new-species-of-rare-ferns-and-flowering-plants/

My first paper. I feel happy of myself.

Maximum likelihood phylogeny of combined nrITS and plastid datasets. Parsimony bootstrap scores are above branches and Bayesian posterior probabilities are below. Bolded species names indicate distylous individuals. Branch lengths are proportional to the inferred number of nucleotide changes along them. The length of the branch leading to O. corniculata has been reduced by half.

Heterostyly in the American bulb-bearing Oxalis. Floral morphs associated with tristylous and distylous breeding systems. Arrows indicate legitimate pollen transfer (Darwin, 1877). In fully functioning heterostylous breeding systems, pollinations other than those indicated by the arrows do not result in fertilization of ovules. Redrawn from Weller, et al. (2007).

Maximum parsimony strict consensus topologies from separate nrITS (88 sequences from 76 individuals, 760 sites, 30% pars. informative) and plastid (71 accessions, 2867 sites, <8% informative) datasets. Bolded species names indicate distylous individuals. Parsimony bootstrap scores are above branches and Bayesian posterior probabilities are below. Incongruence occurs in the placement of O. rosea, and in the order of divergence in the Andean lineages.

Magdalena Vaio’s recent poster on the phylogenetic relationships and cytogenetic characteristics of the creeping Oxalis, sections Ripariae and Corniculatae. She has discovered that these species split into two main clades, one with a base chromosome number (x) of 6, and the other with 5 (fig. 2), apparently derived from the ancestral condition of 6 and of much larger size (fig. 1).

Bulb and succulent root of a two year old Oxalis macrocarpa (AG49). There are four bulblets on ~1/2 cm stolons; three are visible. The root has begun to contract, noticeable in its folded epidermis. The scale bar is 1 cm.

Oxalis decaphylla (AG126); Gila NF, New Mexico.

Gila National Forest, New Mexico.

Oxalis phylogenies for the BSA meetings in mid July, St. Louis, MO.