More than 200 annual wildflowers are native to the land within Chico's city limits, spanning at least 34 families: the amaranth family, carrot family, aster family, borage family, mustard family, bellflower family, caper family, pink family, goosefoot family, pygmyweed family, dodder family, waterwort family, spurge family, pea family, gentian family, geranium family, mint family, meadowfoam family, flax family, false pimpernel family, loosestrife family, mallow family, evening-primrose family, broomrape family, poppy family, lopseed family, plantain family, phlox family, knotweed family, purslane family, buttercup family, madder family, nightshade family, and valerian family. Chico's native annual wildflowers include the following species.1
Aster Family
California goldfields (Lasthenia californica) in a Marysville garden, with California poppy and arroyo lupine. Photo by queerbychoice. blow wives annual mountain dandelion annual water aster (also called slimaster) sticktight (also called devil's beggartick) common stickyseed Klamath Western rosinweed Butte County rosinweed rosinweed Canadian horseweed false daisy Western marsh cudweed (lowland cudweed) hayfield tarweed (also called woodrush tarweed) Fitch's tarweed glandular hareleaf branched hareleaf California goldfields smooth goldfields Fremont's tidytips common tidytips dwarf lessingia slenderstem lessingia wand lessingia California cottonrose lemon-scented tarweed common tarweed slender tarweed slender cottontop Sierra foothill silverpuffs Douglas' silverpuffs short woollyheads Oregon woollyheads slender woolly marbles spiny cockleburr rough cockleburr
Common tidytips (Layia platyglossa) in a Marysville garden. Photo by queerbychoice. 
Rough cockleburr (Xanthium strumarium) in Beckwourth Riverfront Park Complex. Photo by queerbychoice.
Bellflower Family
Hoover's calicoflower bristled calicoflower (also called doublehorn calicoflower) toothed calicoflower harlequin calicoflower folded calicoflower (also called horned calicoflower) flatface calicoflower Sierra bluecup
Borage Family
Common fiddlenecks (Amsinckia menziesii) mingle with popcornflowers on Table Mountain. Photo by queerbychoice. Eastwood's fiddleneck tarweed fiddleneck common fiddleneck Clearwater popcornflower Milo Baker's popcornflower beaked popcornflower small baby blue eyes (also called canyon baby blue eyes) littlefoot nemophila (also called meadow baby blue eyes) little combseed Austin's popcornflower bracted popcornflower valley popcornflower common popcornflower sculptured popcornflower Greene's popcornflower rusty popcornflower scribe popcornflower Shasta popcornflower vernal pool popcornflower (also called stalked popcornflower)
Broomrape Family
Butter 'n' eggs (Triphysaria eriantha) on Table Mountain. Photo by queerbychoice. valley tassels (also called narrowleaf owl's clover) purple owl's clover foothill cutleaf owl's clover butter 'n' eggs (also called johnny tuck) dwarf owl's clover
Evening-Primrose Family
Winecup godetia (Clarkia purpurea) in a Marysville garden. Photo by queerbychoice. glandular fairyfan slender godetia Mildred's farewell-to-spring winecup godetia forest farewell-to-spring mountain garland (also called elegant farewell-to-spring) gunsight fairyfan tall annual willowherb (also called panicled willowherb) selfing spike-primrose smooth spike-primrose narrowleaf spike-primrose
Mountain garland (Clarkia unguiculata) explodes in shades of pink, reddish purple, and white in early May in a garden in Marysville. Photo by queerbychoice. 
Tall annual willowherb (Epilobium brachycarpum) blooms next to a six-foot-tall fence in Marysville. Photo by queerbychoice.
Knotweed Family
knotweed spineflower starlet spineflower wickerstem buckwheat Bidwell's knotweed California knotweed
Lopseed Family
yellow and white monkeyflower Congdon's monkeyflower brownies (also called purple mouse ears) shieldbract monkeyflower Kellogg's monkeyflower Layne's monkeyflower Torrey's monkeyflower tricolor monkeyflower
Mint Family
veiny monardella mustang mint Douglas' pogogyne Sacramento mesamint vinegarweed oblong blue curls (also called mountain blue curls)
Mustard Family
common sandweed spring draba shining pepperweed prostrate pepperweed hairy lacepod (also called sand fringepod) showy fringepod (also called ribbed fringepod)
Pea Family
Sky lupine (Lupinus nanus) on Table Mountain. Photo by queerbychoice. Gambel's dwarf milkvetch depauperate milkvetch foothill shortpod deervetch (also called colchita) Spanish clover Chilean bird's foot trefoil chick lupine sky lupine Mount Diablo lupine (also called fatpod lupine) Indian rancheria clover foothill tree clover cowbag clover (also called dwarf pale sack clover) pinpoint clover hairy clover (also called maiden clover or smallhead field clover) fewflower clover (also called mini-tomcat clover) whitetip clover (also called variegated clover) tomcat clover
The reddish purple flowers of cowbag clover (Trifolium depauperatum) emerge from among invasive, non-native filarees on Table Mountain. Photo by queerbychoice. 
Whitetip clover (Trifolium variegatum) with a yellow seep monkeyflower on Table Mountain. Photo by queerbychoice. 
Tomcat clover (Trifolium willdenovii) in flower and bud on Table Mountain. Photo by queerbychoice.
Phlox Family
Globe gilia (Gilia capitata) with mountain garland in a Marysville garden. Photo by queerbychoice. mountain trumpet globe gilia (also called bluehead gilia) bird's eye gilia true babystars whiskerbrush thread linanthus evening snow variable linanthus slender phlox Tehama pincushionplant needleleaf pincushionplant (also called interwoven navarretia) Bridges' pincushionplant white headed pincushionplant adobe pincushionplant downy purple pincushionplant marigold pincushionplant sticky pincushionplant
Bird's eye gilia (Gilia tricolor) in a Marysville garden. Photo by queerbychoice.
Plantain Family
Purple Chinese pagodas (Collinsia heterophylla) in a Marysville garden. Photo by queerbychoice. spurred snapdragon purple Chinese pagodas few-flowered blue-eyed Mary bractless hedgehyssop hairy purslane speedwell
Spurge Family
Doveweed (Croton setigerus) at Rossmoor Bar. Photo by queerbychoice.
ribseed spurge Contura Creek spurge thymeleaf spurge doveweed warty spurge
Other Families
Red maids (Calandrinia ciliata) at Sicard Flat. Photo by queerbychoice. mat amaranth (also called prostrate pigweed) Powell's amaranth purple ammannia (also called red ammania) silverscale tractscale (also called bractscale or saltscale) Texas bergia red maids Monterey centaury charming centaury (also called canchalagua) desert goosefoot (also called meadw goosefoot) Oregon timwort Utah narrowleaf miner's lettuce (also called streambank springbeauty) miner's lettuce water pygmyweed sand pygmyweed San Joaquin dodder (also called chaparral dodder) bigseed alfalfa dodder five-angle dodder (also called Western field dodder) American wild carrot (also called rattlesnake weed) foothill tufted poppy frying pans common bedstraw (also called goosegrass, stickywilly, or cleavers) roughfruit corn bedstraw sweetscent bedstraw Carolina geranium California dwarf flax white meadowfoam common meadowfoam Butte County meadowfoam yellowseed false pimpernel California fairypoppy California sandwort Douglas' sandwort water chickweed (also called annual water miner's lettuce) bristly mousetail little mousetail Indian tobacco valley broomrape (also called hillside broomrape) sharpleaf groundcherry cutleaf groundcherry prairie longleaf plantain foothill dotseed plantain cream cups longspur seablush white longhorn seablush sandyseed clammyweed lowland rotala sticky annual pearlwort Western pearlwort Sierra mock stonecrop Point Reyes checkerbloom valley checkerbloom hairy checkerbloom
Monterey centaury (Centaurium muehlenbergii) in a Marysville garden. Photo by queerbychoice. 
Foothill tufted poppy (Eschscholzia caespitosa) on Table Mountain. Photo by queerbychoice. 
Common bedstraw (Galium aparine) in a Marysville garden. Photo by queerbychoice. 
Common meadowfoam (Limnanthes douglasii) on Table Mountain. Photo by queerbychoice.
Footnotes
1. CalFlora.org
