Yesterday, I hiked the Gen Canyon Park/Brown Road circuit. Entering the park where the Myrtle Spurge was found last year, I searched again for evidence of its persistence, or further entry from the private rock garden which  still is full of it. 

Since the plant is now blooming, it is more noticeable and I did find more of it just inside the park fence. 

Several other spurge plants poked their tops through the wire from the adjoining rock garden. Six of these I was able to pull out and remove, but the stems of two others broke off, exuding the creamy white sap which welled up to cover the ends of the severed stems.

This sap is poisonous and a severe irritant to mucous membranes. Therefore, in removing the plants, one should use gloves. I did not, and later in the day, I noticed a tingling and burning sensation in my lips and nose, where I think that I may have transferred a minute amount of the sap with my handkerchief.

I quote from Wikipedia:

"The plant's milky sap can cause significant skin and eye irritation in humans. Goggles, gloves and protective gear is often used when removing plants. Children are more susceptible than adults to symptoms from myrtle spurge, suggesting play areas not in proximity to the species. Pets can have similar reactions to myrtle spurge sap exposure. The species can be strongly allelopathic, preventing other plants from growing nearby."

https://en.wikipedia.org/wiki/Euphorbia_myrsinites

The third picture attached was taken just today, along Golf Course Drive near Shannon Lake Golf Course. It illustrates the hardiness of the plant--growing in healthy clumps on virtually bare rock.

The plant in this picture was identified for me as Miner's Lettuce, by Reg Newman. I found it recently on Goats Peak and again yesterday, as I made my way along the east border of the park. It is edible, as the common name suggests.

Continuing along that dry disturbed slope, in the part of the park that until recently was private land, I came upon a plant that I am calling Stork's-bill (Erodium cicutarium). If anyone disagrees, please let me know. 

In dry, disturbed areas,  it is very small, spreading close to the ground. However, in wetter terrain, such as down by Powers Creek, it may reach a foot or more in height.

While the yellow of  Arrow-leaved Balsamroot is the predominating colour on the hills these days, there is another plant that contributes a goodly amount, Oregon Grape. 

This yellow-blossoming shrub, with leaves similar to those of Holly, is a good source of food for bees--and bees were busily collecting nectar and pollen from it yesterday.