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 2,301–2,350 of 9,281.
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Coursetia caribaea (Jacq.) Lavin var. sericea (A. Gray) Lavin COCAS2anil falso · Fabaceae -
Coursetia glabella (A. Gray) Lavin COGL7smooth babybonnets · Fabaceae -
Crambe maritima L. CRMAsea kale · Brassicaceae -
Cranichis muscosa Sw. CRMU3cypress-knee helmet orchid · Orchidaceae - Crassula multicava Lem. CRMU10Cape Province pygmyweed · Crassulaceae
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Crassula saginoides (Maxim.) Bywater & Wickens CRSA7wrinkleseed pygmyweed · Crassulaceae -
Crassula sieberiana (Schult.) Druce CRSI5Siberian pygmyweed · Crassulaceae -
Crassula viridis (S. Watson) Bywater & Wickens CRVI6pricklyseed pygmyweed · Crassulaceae -
Crataegus alma Beadle CRAL14bountiful hawthorn · Rosaceae - Crataegus anamesa Sarg. CRAN10Fort Bend hawthorn · Rosaceae
- Crataegus arcana Beadle CRAR7Carolina hawthorn · Rosaceae
- Crataegus beata Sarg. CRBE6Dunbar's hawthorn · Rosaceae
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Crataegus compacta Sarg. CRCO26clustered hawthorn · Rosaceae -
Crataegus corusca Sarg. CRCO27shiningbranch hawthorn · Rosaceae - Crataegus dallasiana Sarg. CRDA3Dallas hawthorn · Rosaceae
- Crataegus desueta Sarg. CRDE3New York hawthorn · Rosaceae
- Crataegus dispessa Ashe CRDI9mink hawthorn · Rosaceae
- Crataegus distincta Kruschke CRDI11distinct hawthorn · Rosaceae
- Crataegus erythrocarpa Ashe CRER3red hawthorn · Rosaceae
- Crataegus forbesiae Sarg. CRFOForbes's hawthorn · Rosaceae
- Crataegus grandis Ashe CRGR13grand hawthorn · Rosaceae
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Crataegus greggiana Eggl. CRGR2Gregg's hawthorn · Rosaceae - Crataegus harveyana Sarg. CRHA4Harvey's hawthorn · Rosaceae
- Crataegus kelloggii Sarg. CRKE2Kellogg's hawthorn · Rosaceae
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Crataegus laevigata (Poir.) DC. CRLA80smooth hawthorn · Rosaceae - Crataegus latebrosa Sarg. CRLA11densewoods hawthorn · Rosaceae
- Crataegus menandiana Sarg. CRME6Menand's hawthorn · Rosaceae
- Crataegus meridionalis Sarg. CRME3gallion 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 okanaganensis Phipps & R. O'Kennon CROKOkanagan Valley hawthorn · Rosaceae -
Crataegus okennonii Phipps CROK2O'kennon's hawthorn · Rosaceae - Crataegus ovata Sarg. CROV2ovateleaf hawthorn · Rosaceae
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Crataegus pennsylvanica Ashe CRPE3Pennsylvania hawthorn · Rosaceae -
Crataegus phippsii R. O'Kennon CRPH2Phipps' hawthorn · Rosaceae - Crataegus pratensis Sarg. CRPR4prairie hawthorn · Rosaceae
- Crataegus spatiosa Sarg. CRSP5New London hawthorn · Rosaceae
- Crataegus stenosepala Sarg. CRSTduke hawthorn · Rosaceae
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Crataegus suborbiculata Sarg. CRSU3Caughuawaga hawthorn · Rosaceae - Crataegus uvaldensis Sarg. CRUVlonestar hawthorn · Rosaceae
- Crataegus vailiae Britton CRVAMiss Vail's hawthorn · Rosaceae
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Crataegus viburnifolia Sarg. CRVIsawtooth hawthorn · Rosaceae -
Crataegus viridis L. var. desertorum (Sarg.) Keeney & Enquist CRVIDdesert hawthorn · Rosaceae -
Crataegus wootoniana Eggl. CRWOWooton's hawthorn · Rosaceae - Crataegus ×anomala Sarg. (pro sp.) [intricata × mollis] CRAN6Arnold hawthorn · Rosaceae
- Crataegus ×hudsonica Sarg. (pro sp.) [pruinosa × punctata] CRHU3hawthorn · Rosaceae
- Crataegus ×immanis Ashe (pro sp.) [chrysocarpa × pruinosa] CRIMhawthorn · Rosaceae
- Crataegus ×lettermanii Sarg. (pro sp.) [mollis × punctata] CRLE5hawthorn · Rosaceae
- Crataegus ×peckietta Sarg. (pro sp.) [scabrida × succulenta] CRPE14hawthorn · Rosaceae