Journal archives for March 2019

March 05, 2019

Amblyopappus pusillus, please look for this plant.

I'm reading Shore Wildflowers of California, Oregon, and Washington, by Philip A. Munz, and he mentioned some species I would like to find. If anyone out there sees them, let me know. I suppose I could create a project for it, but we will see.

Family Asteraceae;

Amblyopappus pusillus
https://www.inaturalist.org/taxa/75404-Amblyopappus-pusillus
Very small heads, no ray flowers, only minute , tubular disk flowers. Entire or somewhat divided leaves. On beaches, old dunes, and bluffs coastal SLO County to Baja. Flowering March - June. (Rephrased from Munz).

Posted on March 05, 2019 09:07 PM by leafybye leafybye | 2 comments | Leave a comment

March 07, 2019

The misidentification of Lupinus nanus or Lupinus bicolor

Are you good with Lupine sp. ?

Last year, and this year I practiced using the Jepson eFlora key to Lupinus. I identified several annuals and learned the main difference to confirm between L. nanus, and L. bicolor is the proportion of the banner petal. There are others on the key with a similar banner to L. bicolor, but I didn't expect to see them in the area I was looking, so I could safely ignore those.

Between L. nanus and L. bicolor the keel margin cilia are about the same. In L. nanus the banner is about as wide as long, or slightly wider than long. In L. bicolor the banner is longer than wide. Sometimes it is obvious. Once you get to know the local population, it is clear, as well.

L. nanus are generally larger, more densely packed whorls, and very fragrant in my experience. They also form large groups of plants. L. bicolor is usually smaller, and less dense. There are some other annuals in the branch of the key that L. bicolor is in, so you also check for a tooth on the keel. But I think the species in that group are not around San Luis Obispo County, if I recall correctly.

All this to say, if I look through all the observations of L. bicolor, I easily find many I'm sure are L. nanus to my eyes. People confirm their ID, and others jump on, but then they can't always explain why they made the choice. I think they're just looking at photos.

Then, north of here (San Mateo County, and north), apparently the banner on L. bicolor can look less narrow than smaller ones I've seen further south. At least from what I see people posting, and they assure me it is L. bicolor, but I can't tell by their photo.

Let's all please be more careful with these because they look so similar.

Thoughts?

Posted on March 07, 2019 06:05 PM by leafybye leafybye | 9 observations | 50 comments | Leave a comment