Pseudognaphalium luteoalbum  ( ) ( ) Gnaphalium luteoalbum Asteraceae Annual, stems 1-3 dm. tall, usually with many sterile, leafy branches from base; herbage white-woolly; leaves oblong-spatulate, auriculate and clasping but scarcely decurrent; inflorescence mainly terminal, usually a dense, globose cluster or the clusters forming a congested or open, corymbose panicle; heads 3-3.5 mm. high; involucre greenish to light brownish, woolly only at base, the phyllaries ovate to oblanceolate or lanceolate, hyaline except for the small, central, herbaceous part, which is pubescent but scarcely glandular, the tips or papillate; pappus bristles hairy below, the hairs interlocking and the bristles tending to cohere at base and to fall in groups. Cultivated in fields and along irrigation ditches; introduced from the Old World. This weedy species has become increasingly common in California in recent years. It is not always easily distinguished from the larger Gnaphalium chilense...

   Erigeron canadensis  ( ) ( ) Asteraceae Erect annual; stems simple below, paniculately branched above, 2-20 dm. tall; herbage hispid with scattered hairs or glabrous, usually dark or bright green; leaves linear to lanceolate, sessile or the lower leaves narrowed to a petiole, entire or toothed, 5-10 cm. long; heads 3-4 mm. high in a dense panicle; phyllaries scarious-margined, nearly glabrous; rays inconspicuous, white, toothed. Common weed in waste places, often abundant on floodlands and along streams. Throughout California at low altitudes; to eastern United States. It is not common in wet habitats, but as a wasteland weed it is to be expected on floodlands.  "A Flora of the Marshes of California. Herbert L. Mason".

   Solanum douglasii  ( ) ( ) Solanaceae Bushy perennial, 0.6-2 m. tall, with angled stems; herbage puberulent to subglabrate. the simple antrorse hairs with heavy, conical bases; leaves ovate, 2-10 cm. long, coarsely sinuate-dentate. acute to short-acuminate, cuneate to subtruncate at base, sparsely puberulent; inflorescence several-flowered, the peduncle 1-3 cm. long, remaining erect at maturity, the pedicels slender, 5-12 mm. long; calyx 2-3 mm/ long at anthesis, the lobes lanceolate-oblong; corolla white with greenish basal spots, the lobes lanceolate-oblong, 6-11 mm. long; anthers 2.6-4 mm. long; style well exserted beyond anthers; seeds light yellow, minutely reticulate-pitted. Streamsides, swales in coastal dunes, drying floodlands, dry slopes, and waste places: coastal North Coast Ranges in Mendocino County, South Coast Ranges from San Mateo County south to southern California; Baja California, east and south through Arizona and New Mexico to northern Mexico....

   Stachys ajugoides  ( ) ( ) Lamiaceae Rhizomatous perennial; stems erect, or decumbent at base, 10-60 cm. long; herbage villous to hirsute and somewhat glandular; leaves oblong to oblanceolate, narrower at base. crenate to crenate-serrate, long-petioled to sub-sessile; spikes 8-20 cm. long, dense or interrupted, verticels 6-flowered; calyx 6-8 mm long, the teeth lanceolate to deltoid, cuspidate; corolla white to rose, 10-15 mm. long, the upper lip 4-6 mm. long, the lower lip 5-7 mm. long, the tube 7-0 mm. long, saccate near the base, the hairy ring oblique; filaments pubescent. Wet ground at low altitudes: Central Valley and bordering foothills, Coast Ranges south to Los Angeles County.  "A Flora of the Marshes of California. Herbert L. Mason".