An in-depth look at a plant – what makes it special, it’s characteristics, where to find it in the natural landscape, and other notables. Common non-native and invasive plants are occasionally reported about.
Bonnie’s drawing for this issue of OBISPOENSIS has never been used in any local newsletter. Bonnie drew it for Dr. David Keil and my plant taxonomy text back in the early 1970’s. Why has it not been used? Well, first a look at Bonnie’s drawing will indicate that the species produces inconspicuous flowers. It lacks petals, and the flowers are semi-hidden in the axils of its somewhat succulent leaves, and the species is not native to California. Its common names include New Zealand, or dune, spinach, Tetragonia tetragonoides. For you old timers like me, back in the 1970’s its most common published scientific name was Tetragonia expansa.
New Zealand spinach is considered by many to be an invasive weed. I assume we must go along with that, but my experience with it around here is that it’s not particularly good at it. It prefers slightly salty (halophilic) soils. It also seems to require a bit of disturbance. So, look for it at the upper, less salty edge of salt marsh and/or on coastal benches, especially in disturbed sites where few other species can grow. A few individual plants have been found along the edge of Los Osos Creek, west of Bay View bridge. It is especially common along the trails south of Spooner’s Cove in Montaña de Oro State Park, where it became sufficiently dense to warrant a targeted removal project. It can also be encountered as a weed all along the coast.
New Zealand spinach belongs to a family of flowering plants, Aizoaceae, that is primarily native to the Southern Hemisphere. New Zealand spinach is, in fact native to Southern Africa but has spread to New Zealand and is apparently a serious weed throughout southern Australia. Obviously, it has also been introduced into North America and Eurasia. The genus, Tetragonia, has around a dozen species and its generic name is derived from the four (tetra-) wings that are produced on the green fruit. These wings dry up and essentially disappear in the mature fruit. The inconspicuous flower displays a pale yellow color, but the flowers have no petals, only sepals as it only produces a single whorl of perianth (collective term for sepals and petals). If a perianth has only one whorl, botanists tend to regard them as sepals. These sepals, as well as the stamens are attached to the top of the ovary which makes the ovary inferior. The more famous and probably even more weedy members of the Aizoaceae are the ice plants
(Carpobrotus and Mesembryanthemum).
Wherever New Zealand spinach is found growing, its leaves have been used as a green vegetable. One web source indicated that the Magellan expedition around the world was especially happy to find a patch of it. They would pick the leaves, boil them and then dry (preserve) them for eating. It was particularly good in preventing scurvy! However, note that they boiled the leaves before eating them. The leaves contain enough oxalate chemicals to cause oxalate poisoning. Oxalate chemicals are usually destroyed by boiling.
Elegant clarkia gets that name because its flowers are beautiful (and elegant) and the plant stands tall (up to 3 feet or more) which adds to its elegance.read more
Heather Johnson has a new watercolor for us to use on the cover of this issue of Obispoensis. It’s most commonly identified around the central coast as miner’s lettuce (Claytonia (Montia) perfoliata). The situation where a leaf blade base appears to be passed through (perforated) by its stem is said to be perfoliate.read more
The cover of the May-June Obispoensis features a watercolor of Matilija poppy, Romneya coulteri, by Heather Johnson. Dirk Walters provides an introduction and notes to the description written by Alice Meyer back in the 1970’s or early 80’s for the local Audubon Chapter Newsletter.read more
The native plant on the cover of this Obispoensis is a beautiful rendition of a species of the genus Calochortus. The painting is another of Heather Johnson’s.read more
Solanum xanti, Blue nightshade, article accompanied by original watercolor painting by Heather Johnson. Blue nightshade (the name most commonly used around here) is not pushy in its appearance unless it’s in bloom. It is up to a yard tall and the stem is half woody or suffrutescent. The ordinary looking, mostly un-lobed leaves are up to 3 inches long and lanceshaped to oval. Blue nightshade even prefers to grow near other plants and just blend in.read more
The cover of this Obispoensis is another beautiful water color by Heather Johnson. In our area Hummingbird sage can grow in an extensive mat. Its leaves are large (10 in (20 cm) long and 3 in (8 cm) wide). The leaf surface appears quilted. Its family affiliation (Mint or Lamiaceae or Labitae) is shown clearly in Heather’s water color.read more
As well as reddish fruits, this variety of wine grape produces bright red leaves in the fall. Enter DNA to the story. Several DNA studies proved that the cultivar ‘Roger’s Red’ is truly a hybrid between the native California grape and the European wine grape Vitis vinifera var. Alicante Bouschet.read more
I chose the Pismo clarkia because it grows in the area surrounding Mardi’s home and nowhere else. It grows naturally in about 20 occurrences from the southern Edna Valley, south through the foothills and valleys of the Southern San Luis Range, ending east of Pismo Beach and Arroyo Grande (Huasna Valley).read more
Wild (California, yellow, or grass) violet, pansy or Johnny –jump-up This botanical illustration was created by Mardi Niles using a Micron 005 #1 Archival Ink pen and Prismacolor Verithin colored pencils on Bristol Regular paper. It will be the first of several...read more
Author: WOODY FREY, Professor emeritus, OH Department, CalPoly, San Luis Obispo. This article was first published in Pacific Horticulture and is reprinted here with permission. Six miles north of San Luis Obispo, California, up a winding road off Highway 101 at an...read more
The cover drawing and article for this issue of the OBISPOENSIS was written and drawn by Alice Meyer. She was a very active member (and first Hoover Award Recipient in the 1970 and 80’s. She is the one who named our newsletter, OBISPOENSIS, and served as its editor...read 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...read 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....read more
Caliente Mountain is the highest spot in the County, and forms the western side of Carrizo Plain National Monument The oak on Caliente Mountain. is Tucker's oak, a scrub oak with blue-green, spiny leaves that stands a little over head height but can reach to 7 meters....read more
O.K.... so we’re not Vermont. However we do have some pretty fall color displays. If you like the gold of aspen, you will see the same colors in our closely related cottonwood stands, both trees belonging to the genus Populus. Cottonwoods are riparian trees, and the...read more
Introduction October and November are when our Chapter gets serious about growing native plants. We have a November meeting devoted to it as well as our annual plant sale. This got me to remembering some articles written and drawings drawn by Alice G. Meyer that are...read more
California Goldenrod (Solidago velutina ssp. californica or S. californica) The photo by Dr. David Chipping that accompanies this note are of the California goldenrod (Solidago velutina ssp. californica or Solidago californica). According to Dr. Hoover in his Vascular...read more
Desert Evening Primrose (Oenothera deltoides) Desert evening primrose (Oenothera deltoides) is in full bloom at Shell Creek as I write this. So it seemed appropriate to resurrect a drawing Bonnie drew back in 1981. It is one of her earlier drawings since it shows a...read more
Coyote melon Bonnie’s drawing for this issue of Obispoensis is based on a picture sent to me by George Butterworth. The species, Cucurbita palmata, has many common names. The ones I found on the web include coyote melon, coyote gourd, desert gourd, palmate-leafed...read more
Kellogg Oak The following is an article from February 1993. It was chosen by the editor to spare me the choice since Bonnie and I were away in late October. We totally agree with his choice; we had totally forgotten about it. The repeat of this article reminds me that...read more
Oval Leaved Snapdragon Drawing by Bonnie and article by Dr. Malcolm McLeod below appeared in the November, 1991 Obispoensis. When you read it you will see lots of similarities with our current drought situation as well as the much hoped for possibilities of an...read more
Creek Dogwood For this issue of the Obispoensis, I’m going out on a limb so to speak. Since the plant is a very small tree or moderately sized shrub, that limb will prove to be slender. The plant is the red osier, creek, or as stated in the new Jepson California...read more
Spear Orache, Spear Salt Bush As I write this article, it’s August in the year of California’s third most severe drought. There’s not much out there in bloom. So I’ve retreated to one of the few places where plants are doing anything. Yes, I’m returning to the coastal...read more
Red Maids Bonnie’s drawing for this issue of Obispoensis is of a plant that is found throughout the western United States as well as spreading north into British Columbia. It has also been recorded in a couple of South American countries. It is especially common in...read more
We are going back into the archives for this cover of Obispoensis. The landscape is a drawing of the Shell Creek area that Bonnie drew for the December 1991 cover. The inset is an ID drawing of the leaves and acorn of the valley oak. Why would one want to combine...read more