After 3 more weeks of growth (and more seeds germinating), mature leaves are starting to emerge on some of the annual Claytonia that have germinated from my collections around California in 2013. Cauline leaf morphology is often the most diagnostic character for these taxa, so it is REALLY cool for me to observe these plants through their stages of development!
These annual taxa are well known for hybridization and polyploidy, and it has been suggested that many species complexes are morphologically variable and phenotypically plastic due to these processes, but these plants exhibit quite a bit of ontogenetic variability in leaf morphology in addition to plasticity. Take the Claytonia perfoliata(left) and C. perfoliata X parviflora hybrids (right) below: they still have strap-shaped leaves for the first few whorls, then they will both transition to different versions of ‘spoon-shaped’ and ultimately different degrees of fusion of the cauline leaf pair!
This Claytonia rubra (below) will ultimately look very similar the C. perfoliata x parviflora hybrids (above) in leaf morphology, but in contrast it will have beet red coloration on the abaxial (bottom) surfaces of its leaves.
Being able to identify the various stages of development for any Claytonia collection is imperative for identification–many of these annual taxa can only be distinguished from one another when at flowering maturity, albeit using their leaves!
The Claytonia gypsophiloidesseedlings (above) will retain a rather linear leaf morphology of the basal-most leaves through flowering, but as internodes elongate and cauline leaves become more spread apart they will show various degrees of fusion involving leaves of a more lanceolate shape. In addition, these plants will mature to be quite glaucus throughout.
And of course, one cannot forget the ‘ugly duckling’, Claytonia saxosa (below), which is just a bit different from the rest. It will grow to have more oblanceolate-shaped basal leaves with wider cauline leaves that fuse partly at the base. According to a recent survey, Claytonia saxosa is said to be the cutest of all Claytonia!
Still no sign of the tuberous perennials–I hope it gets cold enough for them to show up to the party!
Turns out that some of the seeds I ‘cast’ into pots this past spring season have germinated over the recent holiday weekend, including some Claytonia saxosa seeds collected from the North Coast Ranges of California. The cotyledons on these plants (pictured above) are a bit unlike the rest of the lot that have germinated in that they are very short and stout, in addition to being deep green in pigmentation. Thus far, all of the other “up and coming” seedlings, including those of C. rubra collected from the San Bernardino Mountains (pictured below), appear to have very elongate cotyledons that are considerably more strap-shaped and light green in pigmentation in comparison to C. saxosa.
In addition, there appears to be some differences among the taxa with more elongate cotyledons, as demonstrated by the C. gypsophiloides seedlings pictured below which seem to stand a bit taller than the rest of the species that have germinated thus far!Compare the cotyledons of C. gypsophiloides(above) with those of some C. perfoliata X parviflora hybrids from northern California (below) and you might wonder if you couldn’t identify Claytonia before their first true leaves emerge!
I’ll be interested to see how things develop as we move closer to flowering season for Claytonia! The peculiarities of the C. saxosa seedlings are quite intriguing — I can’t wait for my tuberous perennials to germinate!!!
You’re really going to ask me which Claytonia I think is the cutest?! I find the entire genus to be cute… It’s a really tough choice!
This one from the Southern Sierra is a real crowd pleaser, being found growing in talus of volcanic rocks (Tuff). It appears to be in the C. parviflora complex (C. perfoliata sensu lato), putatively a local endemic based upon evidence from morphology and patterns in tuberous perennial Claytonia in the area. Although not my all-time favorite Claytonia, this cute little annual always makes for an entertaining photo shoot.
This member of the C. virginica complex is also quite stunning, being found on nearly every flood plain of the major rivers draining toward the U.S. Eastern seaboard (this one photographed in North Carolina). The reason it isn’t my favorite? Well, poison ivy (Toxicodendron radicans) also grows on nearly every flood plain draining toward the Eastern seaboard. What is the significance of this distribution you ask? Well, when I go collecting Claytonia and nearly everything else is un-identifiable due to the extremely early flowering season of Claytonia, I end up getting exposed to Toxicodendron a LOT! I now have a systemic reaction whenever I get exposed to Toxicodendron or any other member of the Anacardiaceae… so also when I eat mangos or cashews. I (used to) love mangos!!! Dang…
OK, now we are talking cute here… This thing took my breath away the first time I saw it in the North Coast Ranges of northern California, where it can be found on Franciscan Graywacke (a type of sedimentary rock). Formerly treated as C. obovata Rydb., this taxon is currently treated as C. lanceolata despite its morphological dissimilarity with the latter taxon. And You’re saying this isn’t the cutest?! Why not? Well, I think this little guy was ruined for me when some hooligans decided to start shooting various guns in the air very close to where I was. It was a bit scary, and I think it spoiled the good time I was having at the time ripping these beauties out of the ground (for the sake of science, of course).
Now this one absolutely has to be the cutest, right? Wrong! It is cute, oh yes, but not the cutest. This beauty is just another narrow endemic that is not currently recognized (but hopefully will be soon!)… Levels of cuteness approach the maximum score, but this little beauty (only a few centimeters tall) just isn’t the cream of the crop. It grows in a crummy habitat (steep, loose talus of volcanic rocks), for one, and it also lives behind a locked gate in an area that is proposed for wind energy development. Until I find populations of this unique taxon outside of the Jawbone Canyon in the southern Sierra Nevada, it sits in the same category as the C. virginica complex because it comes with too much baggage… NEXT!
Oh yeah! If you’re cute and you know it, be super small… This is the first member of the C. lanceolata complex I ever found (in the San Bernardino Mountains of southern California on white dolomite). You might say it is the reason I got into this mess in the first place, and thus it holds a special place in my heart. It is amongst the smallest members of what I am calling the C. “peirsonii” complex, a southern California species complex nested within the C. lanceolata complex (which truly is summarized as the ENTIRE clade of tuberous perennial Claytonia, e.g. Claytonia sect. Claytonia). It is very VERY cute, but still not the absolute cutest. Tough competition, right?! This is very close to my all-time favorite Claytonia, but there is one species that takes the cake…
Wow! What a show-stopper! Claytonia saxosa is indeed the cutest Claytonia I have seen to date, but there may just be some species out there that are even cuter than this one, including yellow and pink-flowered tuberous perennial Claytonia that I hope to see in 2014. Until then, this is the cream of the crop, king of the hill, or whatever you want to call it. It is just dang CUTE! Also growing on Franciscan Graywacke in northern California (in close sympatry with C. obovata), this annual species is said to occur on serpentine rocks as well. I’m interested to see if the serpentine plants are really the same taxon, given what patterns have been observed in the tuberous perennials, but until I can get the material I must consider it the same species across its range. I guess I’ll just have to get out there and see it elsewhere… I recommend you get out there and see it too! Anthony Peak (Mendocino National Forest) in the North Coast Ranges of California has a healthy population that is ripe and ready for photographs in the month of May.
In order to get to the bottom of this, I encourage you to cast your vote! Cast your vote for more than one, whatever, but you can only vote once! I want to know if you agree, that C. saxosa is indeed the cutest of all Claytonia-land…