Spiny emex (Emex spinosa)
Mark Skinner (email@example.com)
Spiny emex is in the Buckwheat family (Polygonaceae) and is an up and coming invasive species in California’s south coast. It’s from the Mediterranean region of Africa infesting disturbed areas especially coastal areas with sandy soils. Spiny emex spreads rapidly, crowding out native species. It has simple lime green or yellowish bronze leaves which looks like dock (which is relative) or spinach. The plant is usually two to twelve inches in diameter and produces seeds with a hard, prickly casing and spines that project from the corners. It is easy to dig out of the ground with a fork. Older plant with lots of seeds can easily shred plastic bags. Handle gingerly with tough gloves. For large monotypic infestations, Telar is an effective herbicide.
This year we were delighted to hear an excellent presentation by Dr. Glen Holstein, Chapter Botanist for the Sacramento Valley Chapter of CNPS. In his talk, Rediscovering and Conserving California’s Prairie Landscapes, Glen spoke of how California’s grassland landscapes in the Central Valley are actually heavily dominated by native wildﬂower species as opposed to perennial grass species. (more…)
CONSERVATION: PERMANENT OAK ORDINANCE TO PLANNING COMMISSION, THURSDAY, FEBRUARY 23 (Item PLC 14/2017)
A LITTLE HISTORY, When Justin Wineries clear cut oak woodlands near Adelaida, public outcry resulted in the creation of a Emergency Ordinance to prevent clear cutting of oak. County staff were instructed to come up with permanent ordinance, and the ﬁrst hearing of this will be at the Planning Commission, Feb. 23. (more…)
Dirk Walters, illustration by Bonnie Walters
Oaks have been in the news a lot recently. Essentially all of it has been bad from the Oak’s point of view. First, there was the clearing of valley (Quercus lobata) and blue (Q. douglasii) oaks in the Paso Robles area. and then the spread of Sudden Oak Death (SOD) into our county. The notes along with Bonnie’s drawing were the Obispoensis cover back (more…)
Common (White) Yarrow (Achillea millefollium)
The plant discussed in this issue of the Obispoensis is one that I’ve wanted to take on for a long time, but could never bring myself to ask Bonnie to draw. Since we are using photos to illustrate it by, I think it’s time. One look at the leaves will indicate the reason for my reluctance. The leaves, which are up to four inches long and two inches wide, are divided two or three times into hundreds (thousands) of long, thin, needle-like segments which are weakly aromatic.
The species epithet (millefollium) translates into ‘thousand (mill) leaf (follia). The leaves spiral up the stem getting smaller higher up the stem. The flowers are small and clustered in heads which are themselves crowded into flat topped clusters. Most plants in the wild produce whitish flowers but occasionally one finds plants baring yellowish or pinkish tinged flowers. These have been selected for deeper colors for use in the garden.
There are many sites on the web that offer these ‘colored’ varieties for sale. The species is extremely variable which would be expected by its essentially worldwide range. It’s found throughout the Northern Hemisphere and just about everywhere in the Southern Hemisphere where humans have settled. A plant with such a wide a distribution as well as a strong correlation with human habitats would certainly be considered an introduced weed. I knew it in the roadsides and pastures of the Midwest, North East and in various weedy and native habitats here in California.
So, where is it native?
One can find any answer you want to believe on the Web. In fact, if I’d been asked where it was native before researching this article, I’d have said Eurasia. I found at least one web site that would have agreed with me. However, a majority of botanical sites as well as the Jepson Manual give its native range as “the entire Northern Hemisphere! So accepting it as a California native plant, where does it grow in California. Answer, practically everywhere there’s they can get sufficient water. Yarrow is found from sea level to over 10,000 feet in a wide variety of habitats (including weedy ones) throughout that altitudinal range. One of the better local places to find it is in our coastal dunes where it can be found spreading across the base of dune slip faces. As such it is serves as an important dune stabilizer. I should point out it is that because of its extreme variability common yarrow has had many scientific names applied to it, but recent thinking have reduced most of them to varieties.
How did it get its name?
The genus, Achillea, was applied to the plant by the Father of Taxonomic Botany, Linnaeus himself in the 1700’s. He named it in Honor of the Greek hero, Achilles. Why did he name it after a non-botanical war hero who was killed in the Battle of Troy? Again if one should look up this plant on the Web, one would find lots and lots of sites that discuss its medicinal uses, many with warnings they are not guaranteeing its effectiveness. In the 17-hundreds yarrow was considered a panacea or a cure-all. The story goes that Achilles was charmed and no weapon could harm him. He’d the protection via his mother dipping him in the river Styx when he was a baby. The River Styx was the transport medium for souls to get to Hades (the land of the dead). However his mother was afraid he would drown if she let go of him completely; so she held him by his heel which therefore did NOT come in contact with waters granting protection. So at Troy, Achilles was killed by a poison arrow which nicked his unprotected heel.
Why bring up Achilles Heel? According to the story told by my major Professor, no modern Pharmacopeia (an official list of medicinal plants) contains yarrow. I.e. after extensive testing, experts have determined that yarrow has NO medicinal value. That Achilea millefolium has no medicinal value “is in fact yarrow’s Achilles heel”.
SOME REALLY SILLY PAST YARROW USES (Source: Botanical.com)
- Put it under your pillow and you will dream a vision of your future spouse
- Snort it as snuff
- Stick it up your nose to either (a) stop a nose bleed, or (b) to start a nose bleed to let blood out of your head to relieve a headache
- Stick it in the other end and it stops your piles from bleeding
- Use it as a shampoo and it will prevent baldness
- Use it in Devil Worship… it was once called ‘The Devil’s Nettle” and maybe not so silly… it was a salad ingredient in the 17th Century, and was mixed with hops to make a more potent beer in Sweden and parts of Africa. Now your’e talking.
– Dr. Dirk Walters (firstname.lastname@example.org)
MARLIN HARMS DOES A MIND WALK FOR CENTRAL COAST PARK ASSOCIATION
On Feb 13, 10:15 AM Marlin Harms will present “The Unique Flora of the Central Coast,” a tour of SLO County’s wildflowers that will include noteworthy photos as well as some life history features of both familiar wildflowers plus less well-known endemic and endangered species. He will offer some locations to see wildflowers, some of which may be new to those who aren’t ardent CNPS field trippers.
Part of A Mind Walk series, Morro Bay Veteran’s Hall, 209 Surf St., Morro Bay. Free to Cent. Coast State Parks Assoc. Members, $3 for others.