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
- 9,281
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Showing 1,751–1,800 of 9,281.
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Centaurea uniflora Turra ssp. nervosa (Willd.) Bonnier & Layens CEUNNsingleflower knapweed · Asteraceae - Centaurea ×pouzinii DC. [aspera × calcitrapa] CEPO8knapweed · Asteraceae
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Centaurium glanduliferum (Correll) B.L. Turner CEGL6sticky centaury · Gentianaceae - Centaurium maryannum B.L. Turner CEMA19gypsum centaury · Gentianaceae
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Centaurium namatophilum Reveal, C.R. Broome & Beatley CENA2springloving centaury · Gentianaceae -
Centaurium sebaeoides (Griseb.) Druce CESE6lavaslope centaury · Gentianaceae -
Centaurium spicatum (L.) Fritsch CESP3spiked centaury · Gentianaceae -
Centaurium tenuiflorum (Hoffmanns. & Link) Fritsch CETE9slender centaury · Gentianaceae -
Centella asiatica (L.) Urb. CEASspadeleaf · Apiaceae -
Centratherum punctatum Cass. CEPU6larkdaisy · Asteraceae -
Centromadia parryi (Greene) Greene ssp. australis (D.D. Keck) B.G. Baldw. CEPAApappose tarweed · Asteraceae -
Centromadia pungens (Hook. & Arn.) Greene ssp. laevis (D.D. Keck) B.G. Baldw. CEPULcommon tarweed · Asteraceae -
Centrosema sagittatum (Humb. & Bonpl. ex Willd.) Brandegee ex Riley CESA6arrowleaf butterfly pea · Fabaceae -
Cephalanthus salicifolius Humb. & Bonpl. CESA3Mexican buttonbush · Rubiaceae -
Cephalaria gigantea (Ledeb.) Bobr. CEGI2Tatarian cephalaria · Dipsacaceae -
Cerastium aleuticum Hultén CEALAleutian chickweed · Caryophyllaceae -
Cerastium arvense L. ssp. velutinum (Raf.) Ugborogho var. villosum (Muhl. ex Darl.) Hollick & Britton CEARV4field chickweed · Caryophyllaceae - Cerastium gorodkovianum Schischkin CEGOtundra chickweed · Caryophyllaceae
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Cerastium gracile Dufour CEGR7slender chickweed · Caryophyllaceae -
Cerastium maximum L. CEMA5great chickweed · Caryophyllaceae -
Cerastium sordidum B.L. Rob. CESO4Chihuahuan chickweed · Caryophyllaceae -
Ceratonia siliqua L. CESI3St. John's bread · Fabaceae -
Ceratopteris richardii Brongn. CERI2triangle waterfern · Parkeriaceae -
Ceratostigma plumbaginoides Bunge CEPL2blue leadwood · Plumbaginaceae -
Ceratotheca triloba (Bernh.) E. Mey. ex Hook. f. CETR5wild foxglove · Pedaliaceae -
Cercidiphyllum japonicum Siebold & Zucc. CEJA2katsura tree · Cercidiphyllaceae -
Cercocarpus montanus Raf. var. blancheae (C.K. Schneid.) F.L. Martin CEMOBisland mountain mahogany · Rosaceae -
Cercocarpus montanus Raf. var. minutiflorus (Abrams) F.L. Martin CEMOMsmooth mountain mahogany · Rosaceae -
Cercocarpus traskiae Eastw. CETR4Catalina Island mountain mahogany · Rosaceae -
Cereus hildmannianus K. Schum. CEHI3hedge cactus · Cactaceae -
Cestrum aurantiacum Lindl. CEAU2orange jessamine · Solanaceae -
Cestrum fasciculatum (Schltdl.) Miers CEFA3early jessamine · Solanaceae -
Cestrum parqui L'Hér. CEPA9Chilean jessamine · Solanaceae -
Chaenactis carphoclinia A. Gray var. peirsonii (Jeps.) Munz CHCAP2Peirson's pincushion · Asteraceae -
Chaenactis cusickii A. Gray CHCUCusick's pincushion · Asteraceae -
Chaenactis glabriuscula DC. var. orcuttiana (Greene) H.M. Hall CHGLOOrcutt's yellow pincushion · Asteraceae -
Chaenactis nevii A. Gray CHNE6John Day's pincushion · Asteraceae -
Chaenactis parishii A. Gray CHPAParish's chaenactis · Asteraceae -
Chaenactis suffrutescens A. Gray CHSUShasta chaenactis · Asteraceae -
Chaenactis thompsonii Cronquist CHTHThompson's pincushion · Asteraceae -
Chaerophyllum bulbosum L. CHBU5turnip-root chervil · Apiaceae -
Chaerophyllum tainturieri Hook. var. dasycarpum Hook. ex S. Watson CHTADhairyfruit chervil · Apiaceae -
Chaetopappa hersheyi S.F. Blake CHHEGuadalupe leastdaisy · Asteraceae - Chaetopappa parryi A. Gray CHPA2Parry's leastdaisy · Asteraceae
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Chamaebatia australis (Brandegee) Abrams CHAU2southern mountain misery · Rosaceae -
Chamaechaenactis scaposa (Eastw.) Rydb. var. parva Preece & Turner CHSCPfullstem · Asteraceae -
Chamaecrista absus (L.) Irwin & Barneby CHAB3tropical sensitive pea · Fabaceae -
Chamaecrista absus (L.) Irwin & Barneby var. meonandra (Irwin & Barneby) Irwin & Barneby CHABMtropical sensitive pea · Fabaceae -
Chamaecrista fasciculata (Michx.) Greene var. macrosperma (Fernald) C.F. Reed CHFAM2partridge pea · Fabaceae - Chamaecrista greggii (A. Gray) Pollard ex A. Heller CHGR18Gregg's sensitive pea · Fabaceae