Journal archives for May 2022

May 08, 2022

City Nature Challenge (2022) - San Francisco Bay Area

I visited these 4 places for the City Nature Challenge 2022:
Day 1 (29-Apr-2022, 5.5 hrs): Sierra Azul OSP, Limekiln & Priest Rock Trails
This was one of the best days ever! I've never seen so many species and I even spotted some new ones (for me).

Day 2 (29-Apr-2022, 2 hrs): Sunnyvale Baylands
Took a short walk around the hill and paths by the water treatment plant to get some photos of sea birds. Saw 9 turtles sunning themselves - all native. (My feet were hurting from yesterday's 5.5 hr. hike.)

Day 3 (01-May-2022, 4 hrs): Joseph D. Grant County Park, Manzanita Trail to unnamed pond
Walked with my granddaughter Faith. She's great at spotting small things. She caught a water snake, newt babies, a tree frog, and tadpoles with her net (catch & release). It was a blast!

Day 4 (02-May-2022, 2 hrs): Ulistac Natural Area
It was an overcast windy morning. Not ideal conditions for photographing birds, plants & bugs.

Stats:
572 Observations
313 Species

Audio Recordings:
32

Identifications:
828

Event Summary:
https://www.inaturalist.org/posts/65744-thanks-so-much-sf-bay-area

Posted on May 08, 2022 12:16 AM by truthseqr truthseqr | 0 comments | Leave a comment

May 11, 2022

How to identify Malva multiflora (Cretan mallow)

This project collects observations of Malva multiflora (Cretan mallow) in California for the purpose of facilitating identification and preventing misidentification of this species in iNaturalist.

Photo tips:

  • It’s important to get a picture of the entire plant.
  • If there are multiple plants in the picture, crop your photo to focus on the plant of interest.
  • Provide close-up pictures of the face of the flowers and fruits (when covered by the calyx and with the calyx peeled back). Also, provide side views of the petals, calyx and epicalyx to show the length of petals vs calyx and the structure of the epicalyx (separate or united segments) . Note whether the fruits are smooth or reticulated. These views are required for identification to species.
  • Note that Malva plants without flowers and fruits can’t be identified to species and should remain at the genus level (i.e., Malva).

How to identify Malva multiflora:

  • Height: Tall, shrubby habit. However, it can sometimes be found growing quite low.
  • Stems: This plant has a tough, somewhat hairy stem and grows to a maximum height of 1 – 3 m (3 – 10 ft).
  • Leaves: The leaves are multilobed with flat or wavy edges, slightly hairy, and 4 – 10 cm (1.6 – 3.9 in) long. Upper stem leaves are not deeply divided.
  • Flowers: Petals are generally pink, pale purple, or white with three veins of darker pink, and 1 – 1.6 cm in length (0.4 – 1.0 in). Petals are smaller and paler than other mallows of the same size.
  • Calyx/Epicalyx: Flowers are longer than the calyx. The calyx lobes are generally 5 mm in length, but expand greatly once the flower has been pollinated and set seed. Epicalyx segments are shorter than the calyx and united for about 25% of their length.
  • Fruit: The fruit is a round, disk-like schizocarp that breaks up into 7 – 10 segments called mericarps that are smooth without hairs or ribs or only faintly veined.
  • Habitat: Disturbed places on coastal bluffs, dunes, occasionally inland;
  • Peak Flowering Time: April - June

Similar Species:

  • Malva sylvestris (Common Mallow)
  • Malva parviflora (Cheeseweed Mallow)
  • Malva nicaeensis (Bull Mallow)

How to differentiate M. multiflora from M. nicaeensis:

  • M. multiflora has an epicalyx that is entire (united); M. nicaeensis has an epicalyx that is divided to the base.
  • M. multiflora has petals up to 30 mm; M. nicaeensis has petals up to 12 mm in length.
  • M. multiflora has mericarps that are smooth or slightly wrinkled (rugose). M. nicaeensis has rugose mericarps.

References:

Posted on May 11, 2022 03:26 PM by truthseqr truthseqr | 0 comments | Leave a comment