Chrysanthemoides - boneseed:
It is a long and complex story, but we believe we discovered how the first Chrysanthmoides - boneseed plant arrived in Lauguna Beach. It was apparently planted by legendary Laguna Beach gardener Hortense Miller. The original plant, now quite old, was still growing in her garden. OC CNPS worked with the garden leadership and it was agreed that the plant would be removed.
Weed Management Area Meeting:
The March WMA meeting was in Riverside and attended by OC CNPS committee co-chair Jutta Burger. Jutta gave updates of OC CNPS activities and also relayed updates of other regional invasive plant activities back to our chapter committee.
Natural Communities Coalition:
The OC Coastal NCC has contracted with Robb Hamilton, who has in turn employed James Bailey, to survey about 150 miles of trails throughout the coastal NCC area, This includes lands within OC Parks, CA State Parks, the Irvine Ranch Natural Landmarks and others. He has already begun the surveys and will be searching for and reporting on a specific list of priority invasive plants. He will also be search for new and unknown possibly invasive plants that may be new to the region.
Volutaria management is continuing at UNB, both on the Big Canyon colony - with IRC, and on the Irvine Blvd. colony - with OC Parks. A possible volunteer pull for late March at the Irvine Blvd. colony was cancelled due to good management by OC Parks contractors and OC Parks/LCF (Laguna Canyon Foundation) volunteers. The feeling was that there was not enough Volutaria remaining for a seperate volunteer event.
Also regarding Volutaria, James Bailey, working under the coastal NCC, surveyed trails in both areas and communicated additional detections and a current status to the managing agencies.
New Species Detection:
On 3-31 Jonathan Frank, a CNPS member, detected a first OC occurrence of Galenia pubescens in the Laguna Coast Wilderness. His detection was reported to the OC CNPS Emergent Invasive Committee and others. The detection has been passed through to OC Parks and CA State Parks biologists and to the coastal NCC. OC CNPS is proceeding cautiously until we know the severity of the infestation and have adequately assessed the invasive threat of this species.
A few other random reports of non-native detections came in on various species, but mostly re "former" emergent species. Nothing significant.
Emergent Invasive Report: Mar 7
They are proposing to add:
- Ten plant species that are currently deemed invasive in California, based on completed assessments of impact and spread
- 87 species deemed to be a high-risk for becoming invasive in California. (We completed assessment for 200 species established outside cultivation in California, and these 87 are those that scored “high-risk.”)
You can view all information at http://cal-ipc.org/ip/inventory/update.php, including individual assessments, summary tables, the project team, and how to submit comments.
The 60-day public comment period runs from March 8 to May 8. The project team will post responses to input received, and for plant species whose categorization changes based on input received from this review period, the project team will post the revised assessments for a subsequent 30-day comment period
The OC CNPS general meeting in Irvinewas devoted to the chapter's Emergent Invasive Plant Management Program. 60 members and guests participated.
On Jan. 8:
A survey by OC CNPS revealed a new large colony of Volutaria tubuliflora at Upper Newport Bay on the mesas adjacent to Irvine Blvd. The population appears to number in the thousands. The colony was mapped and posted to Calflora. Several interested parties, including OC Parks, Cal-IPC and others were notified, with management beginning on January 16.
Emergent Invasive Report: December 29
Emergent Invasive Report: November 7
Emergent Invasive Report: September/October 2016
On Oct. 8:
One of SoCal's best botanists, Rick Riefner, detected and reported a colony of the highly invasive boneseed bush - Chrysanthemoides monolifera in Newport Beach. The colony was site checked, mapped and posted to Calflora the following day. This is the third detection in Orange County and perhaps only the fourth in the U.S.
On Sept. 23:
On Friday we participated in a second conference call regarding a proposal for Volutaria tubuliflora (knapweed) eradication in Southern California (three sites). The group includes participants from Cal-IPC, S.D. County Ag, UCCE, UCR, CDFA, S.D. Co. Public Works, Anza-Borrego S.P., IRC and volunteers.
The working group is centered around a Cal-IPC grant request to The National Fish & Wildlife Foundation. A funding decision is expected in early January, with on-the-ground action beginning Immediately thereafter. By far, the Anza-Borrego infestation is the most serious, but the Newport Bay colony is also significant, esp. due to its urban location and potential for further dispersal.
We are requesting a systematic Volutaria tubuliflora survey of the greater Upper Newport Bay Area. A small second population (five plants) were found a mile away in Jan. '16 and there is concern that we may not know the full extent of the population and need to accurately delimit the infestation.
IRC has a good handle on the Big Canyon infestation and we have high confidence in their management success - if indeed Big Canyon area is the extent of the infestation.
The Newport Bay Conservancy is a good source of volunteers and an important liaison.
The small new population (five plants near the Muth Center) is on Orange County Parks land. It was suggested that both OC Parks and City of Newport Beach be included in the larger stakeholder group.
Cal-IPC is submitting comment to the California Wildlife Conservation Board (WCB) on their draft "conservation vision," which will guide their work over the next five years. WCB has funded two regional early-eradication projects in the last two years, which is a good start. A lot more needs to be done, and stopping invasive plants should be made an explicit priority in their planning. Unfortunately, WCB's draft plan does not even mention invasive species. OCCNPS was asked to sign-on as an endorser of this request, which OC CNPS has done.
On Sept. 15:
Joan Miller, a CNPS member and volunteer with OC Parks and others, is in communications with OC Parks and the City of Laguna Niguel to begin management of the Senecio linearifolius Australian linear-leaved fireweed in portions of Salt Creek, from near PCH to north of Camino Del Avion. The infestation is significant.
Control is complete this year on the stinkwort colonies (Dittrichia viscida) in the Arroyo Trabuco and on Hwy. 74.
Control is complete this year on the Centaurea solstitialis - yellow star thistle colonies along Hwy 74.
Additional plants or colonies were discovered of Araujia sericifera - bladderflower (Irvine), Asphodelus fistulosus - onionweed (Laguna Niguel), Robinia pseudoacacia - black locust (Laguna Beach and San Juan Capistrano), Rubus armeniacus - Himalayan blackberry (San Juan Capistrano) and Senecio linearifolius - Australian linear-leaved fireweed (Laguna Niguel).