Explore / Range and rarity / Single-county taxa
Range and rarity
Single-county taxa
Taxa documented in only a single county across the entire catalogue. Mostly local endemics, sub-rank curiosities, and rarely-collected outliers — the eccentric edge of the flora.
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Showing 801–850 of 3,373.
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Cosmos caudatus Kunth COCA21wild cosmos · Asteraceae -
Costus malortieanus H. Wendl. COMA26stepladder ginger · Costaceae -
Costus spicatus (Jacq.) Sw. COSP4spiked spiralflag · Costaceae -
Costus woodsonii Maas COWOScarlet Spiral-Ginger · Costaceae -
Cotoneaster acuminatus Lindl. COAC7acuminate cotoneaster · Rosaceae -
Cotoneaster adpressus Bois COADcreeping cotoneaster · Rosaceae -
Cotoneaster hupehensis Rehder & E.H. Wilson COHU80Hupeh cotoneaster · Rosaceae -
Cotoneaster multiflorus Bunge COMU9cotoneaster · Rosaceae -
Crambe maritima L. CRMAsea kale · Brassicaceae -
Crassula sieberiana (Schult.) Druce CRSI5Siberian pygmyweed · Crassulaceae -
Crataegus alma Beadle CRAL14bountiful hawthorn · Rosaceae - Crataegus arcana Beadle CRAR7Carolina hawthorn · Rosaceae
- Crataegus dallasiana Sarg. CRDA3Dallas hawthorn · Rosaceae
- Crataegus desueta Sarg. CRDE3New York hawthorn · Rosaceae
- Crataegus distincta Kruschke CRDI11distinct hawthorn · Rosaceae
- Crataegus erythrocarpa Ashe CRER3red hawthorn · Rosaceae
- Crataegus forbesiae Sarg. CRFOForbes's hawthorn · Rosaceae
- Crataegus harveyana Sarg. CRHA4Harvey's hawthorn · Rosaceae
- Crataegus latebrosa Sarg. CRLA11densewoods hawthorn · Rosaceae
- Crataegus menandiana Sarg. CRME6Menand's hawthorn · Rosaceae
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Crataegus nananixonii Phipps & R. O'Kennon CRNA4Nixon's hawthorn · Rosaceae - Crataegus nitidula Sarg. CRNI4Ontario hawthorn · Rosaceae
- Crataegus nuda Sarg. CRNU4nude hawthorn · Rosaceae
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Crataegus phippsii R. O'Kennon CRPH2Phipps' hawthorn · Rosaceae - Crataegus pratensis Sarg. CRPR4prairie hawthorn · Rosaceae
- Crataegus uvaldensis Sarg. CRUVlonestar hawthorn · Rosaceae
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Crataegus viridis L. var. desertorum (Sarg.) Keeney & Enquist CRVIDdesert hawthorn · Rosaceae -
Crepis bursifolia L. CRBU3Italian hawksbeard · Asteraceae -
Crepis foetida L. var. foetida CRFOFstinking hawksbeard · Asteraceae -
Crepis foetida L. var. rhoeadifolia (M. Bieb.) Celak. CRFORstinking hawksbeard · Asteraceae -
Crepis rubra L. CRRU9red hawksbeard · Asteraceae -
Crepis zacintha (L.) Babc. CRZA2striped hawksbeard · Asteraceae -
Crescentia cujete L. CRCUcommon calabash tree · Bignoniaceae -
Crocus angustifolius Weston CRAN5cloth of gold · Iridaceae -
Crossosoma californicum Nutt. CRCA4California rockflower · Crossosomataceae -
Crotalaria brevidens Benth. var. brevidens CRBRBEthiopian rattlebox · Fabaceae -
Crotalaria trichotoma Bojer CRTR12West Indian rattlebox · Fabaceae -
Croton pottsii (Klotzsch) Müll. Arg. var. thermophilus (M.C. Johnst.) M.C. Johnst. CRPOTleatherweed · Euphorbiaceae -
Croton soliman Cham. & Schltdl. CRSO2Soliman's croton · Euphorbiaceae -
Croton suaveolens Torr. CRSU7scented croton · Euphorbiaceae -
Crupina vulgaris Cass. var. brachypappa P. Beauv. CRVUBcommon crupina · Asteraceae -
Cryptantha atwoodii Higgins CRAT2Atwood's cryptantha · Boraginaceae -
Cryptantha barnebyi I.M. Johnst. CRBA6oilshale cryptantha · Boraginaceae -
Cryptantha clokeyi I.M. Johnst. CRCL2Clokey's cryptantha · Boraginaceae - Cryptantha insolita (J.F. Macbr.) Payson CRIN15Las Vegas cryptantha · Boraginaceae
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Cryptantha mirabunda Brand CRMI7wonderful cryptantha · Boraginaceae -
Cryptantha roosiorum Munz CRRO3bristlecone cryptantha · Boraginaceae -
Cryptantha subcapitata Dorn & Lichvar CRSU15Wallowa cryptantha · Boraginaceae -
Cryptocoryne beckettii Thwaites ex Trimen. CRBE10Beckett's water trumpet · Araceae -
Cryptocoryne walkeri Schott CRWA4water-trumpet · Araceae