Explore / Range and rarity / Rare (≤ 5 counties)
Range and rarity
Rare (≤ 5 counties)
A broader rarity slice: taxa known from five counties or fewer nationwide. Includes single-county endemics plus the next-most-restricted species.
- Matching taxa
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Showing 2,351–2,400 of 9,281.
- Crataegus ×simulata Sarg. [calpodendron × crus-galli] CRSI3hawthorn · Rosaceae
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Crepis acuminata Nutt. ssp. pluriflora Babc. & Stebbins CRACPtapertip hawksbeard · Asteraceae -
Crepis bursifolia L. CRBU3Italian hawksbeard · Asteraceae -
Crepis foetida L. CRFO2stinking hawksbeard · Asteraceae -
Crepis foetida L. var. foetida CRFOFstinking hawksbeard · Asteraceae -
Crepis foetida L. var. rhoeadifolia (M. Bieb.) Celak. CRFORstinking hawksbeard · Asteraceae -
Crepis modocensis Greene ssp. glareosa (Piper) Babc. & Stebbins CRMOG3Modoc hawksbeard · Asteraceae -
Crepis nicaeensis Balbis ex Pers. CRNI2Turkish hawksbeard · Asteraceae -
Crepis rubra L. CRRU9red hawksbeard · Asteraceae -
Crepis runcinata (James) Torr. & A. Gray ssp. barberi (Greenm.) Babc. & Stebbins CRRUBBarber's hawksbeard · Asteraceae -
Crepis zacintha (L.) Babc. CRZA2striped hawksbeard · Asteraceae -
Crescentia cujete L. CRCUcommon calabash tree · Bignoniaceae -
Crinum asiaticum L. CRAS6poisonbulb · Liliaceae -
Crocus angustifolius Weston CRAN5cloth of gold · Iridaceae -
Crocus vernus (L.) Hill CRVE4dutch crocus · Iridaceae - Croptilon hookerianum (Torr. & A. Gray) House var. graniticum (E.B. Sm.) E.B. Sm. CRHOGHooker's scratchdaisy · Asteraceae
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Crossopetalum ilicifolium (Poir.) Kuntze CRIL2Christmasberry · Celastraceae - Crossopetalum rhacoma Crantz CRRHmaidenberry · Celastraceae
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Crossosoma californicum Nutt. CRCA4California rockflower · Crossosomataceae -
Crotalaria assamica Benth. CRAS2Indian rattlebox · Fabaceae -
Crotalaria avonensis DeLaney & Wunderlin CRAVAvon Park rattlebox · Fabaceae -
Crotalaria berteriana DC. CRBE8Berteron's rattlebox · Fabaceae -
Crotalaria brevidens Benth. CRBR8Ethiopian rattlebox · Fabaceae -
Crotalaria brevidens Benth. var. brevidens CRBRBEthiopian rattlebox · Fabaceae -
Crotalaria brevidens Benth. var. intermedia (Kotschy) Polhill CRBRIEthiopian rattlebox · Fabaceae -
Crotalaria juncea L. CRJUsunn hemp · Fabaceae -
Crotalaria longirostrata Hook. & Arn. CRLO3longbeak rattlebox · Fabaceae -
Crotalaria micans Link CRMI9Caracas rattlebox · Fabaceae -
Crotalaria trichotoma Bojer CRTR12West Indian rattlebox · Fabaceae -
Crotalaria verrucosa L. CRVE5blue rattlesnake · Fabaceae -
Crotalaria virgulata Klotzsch CRVI14thicket rattlebox · Fabaceae -
Crotalaria virgulata Klotzsch ssp. grantiana (Harv.) Polhill CRVIGGrant's rattlebox · Fabaceae -
Croton alabamensis E.A. Sm. ex Chapm. var. texensis Ginzbarg CRALTAlabama croton · Euphorbiaceae - Croton argenteus L. CRAR5silver July croton · Euphorbiaceae
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Croton bonplandianus Baill. CRBO4Bonpland's croton · Euphorbiaceae - Croton cascarilla (L.) L. CRCA29grannybush · Euphorbiaceae
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Croton ciliatoglandulifer Ortega CRCIMexican croton · Euphorbiaceae -
Croton cortesianus Kunth CRCO9Cortez's croton · Euphorbiaceae -
Croton coryi Croizat CRCO10Cory's croton · Euphorbiaceae -
Croton glandulosus L. var. arenicola (Small) B.W. van Ee, P.E. Berry & S. Ginzbarg CRGLA2sand croton · Euphorbiaceae -
Croton glandulosus L. var. scordioides (Lam.) Müll. Arg. CRGLS4Brazilian croton · Euphorbiaceae -
Croton lobatus L. CRLO5lobed croton · Euphorbiaceae -
Croton pottsii (Klotzsch) Müll. Arg. var. thermophilus (M.C. Johnst.) M.C. Johnst. CRPOTleatherweed · Euphorbiaceae -
Croton sancti-lazari Croizat CRSA5Trans-Pecos croton · Euphorbiaceae -
Croton soliman Cham. & Schltdl. CRSO2Soliman's croton · Euphorbiaceae -
Croton sonorae Torr. CRSOSonoran croton · Euphorbiaceae -
Croton suaveolens Torr. CRSU7scented croton · Euphorbiaceae -
Croton texensis (Klotzsch) Müll. Arg. var. utahensis Cronquist CRTEUUtah croton · Euphorbiaceae -
Croton trinitatis Millsp. CRTR8roadside croton · Euphorbiaceae -
Croton wigginsii L.C. Wheeler CRWI2Wiggins' croton · Euphorbiaceae