subfamilyCaryophyllaceae subfam. Caryophylloideae genusVelezia speciesVelezia rigida Linnaeus Sp. Pl. 1: 332. 1753. Ronald L. Hartman, Richard K. Rabeler IntroducedIllustrated
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Machaeranthera canescens var. aristata (Eastwood) B. L. Turner Machaeranthera rigida Greene Treatment appears in FNA Volume 20. Treatment on page 400. Mentioned
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W. H. Brewer et al., Bot. California 1: 622. 1876 Synonyms: Adenostegia rigida var. brevibracteata (A. Gray) Greene C. rigidus var. brevibracteatus (A
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[L. caparosa (Cambessèdes) H. Hara, L. nervosa (Poiret) H. Hara, and L. rigida (Miquel) Sandwith], or to the Caribbean and the southern United States [L
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Chloridoideae tribePoaceae tribe Cynodonteae genusMuhlenbergia speciesMuhlenbergia rigida (Kunth) Trin. Paul M. Peterson Common names: Purple muhly Synonyms: Muhlenbergia
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LAYOUT:treatment:TUOYAL familyPinaceae genusPinus speciesPinus rigida Miller Gard. Dict., ed. 8 Pinus no. 10. 1768. Robert Kral Common names: Pitch pine pin
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LAYOUT:treatment:TUOYAL familyOrobanchaceae genusCastilleja speciesCastilleja rigida Eastwood Proc. Amer. Acad. Arts 44: 575. 1909. J. Mark Egger, Peter F. Zika
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Salix mackenzieana var. macrogemma C. R. Ball Salix rigida var. mackenzieana (Hooker) Cronquist Salix rigida var. macrogemma (C. R. Ball) Cronquist Treatment
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abrasa Fernald Salix missouriensis Bebb Salix rigida Muhlenberg Salix rigida var. angustata (Pursh) Fernald Salix rigida var. vestita (Andersson) C. R. Ball Treatment
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filaginifolia var. pinetorum I. M. Johnston Corethrogyne filaginifolia var. rigida A. Gray Corethrogyne filaginifolia var. robusta Greene Corethrogyne filaginifolia
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LAYOUT:treatment:TUOYAL familySphagnaceae genusSphagnum sectionSphagnum sect. Rigida speciesSphagnum strictum Sullivant Musc. Allegh., 201. 1846,. Cyrus B. McQueen†
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Eckel Pottiaceae Aloina hamulus Patricia M. Eckel Pottiaceae Aloina rigida var. rigida Patricia M. Eckel ... further results
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Common names: Pond pine Endemic Synonyms: Pinus rigida subsp. serotina (Michaux) R.T. Clausen Pinus rigida var. serotina (Michaux) Hoopes Treatment appears
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Sep–Oct(–Nov). Habitat: Ultramafic outcrop barrens, in Quercus alba-Pinus rigida-Sporobolus heterolepis-Andropogon gerardii woodlands and grass-dominated
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abaxial solid papillae near the leaf tip distinguish Aloina hamulus from A. rigida, which, in addition, has a strongly twisted and longer peristome. The ovoid-cylindric
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Naczi, Charles T. Bryson IllustratedEndemic Synonyms: Carex amphibola var. rigida (L. H. Bailey) Fernald Treatment appears in FNA Volume 23. Treatment on
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names: Bearbrush Endemic Synonyms: Garrya fremontii var. laxa Eastwood G. rigida Eastwood Treatment appears in FNA Volume 12. Treatment on page 553. Mentioned
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disjuncta Sargent C. pruinosa var. brachypoda (Sargent) E. J. Palmer C. rigida Treatment appears in FNA Volume 9. Treatment on page 575. Mentioned on page
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Carol., 214. 1788. John L. Strother Endemic Synonyms: Coreopsis major var. rigida (Nuttall) F. E. Boynton Coreopsis major var. stellata (Nuttall) B. L. Robinson
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hordeoides grows in dry, rocky, often shallow soils, particularly in Artemisia rigida-Poa secunda communities, from eastern Washington and Idaho to northern California
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var. watsonii (Bebb) Dorn Salix lutea var. watsonii (Bebb) Jepson Salix rigida var. watsonii (Bebb) Cronquist Treatment appears in FNA Volume 7. Treatment
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2–4 subulate scales; central and south central Colorado. rigida: Grindelia robusta var. rigida; see camporum. robusta: Grindelia robusta; fide M. A. Lane
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John Myers John Myers Alismataceae Alismataceae Alismataceae Sagittaria rigida Sagittaria brevirostra Sagittaria cuneata John Myers John Myers John Myers
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Papaveraceae Papaveraceae Sanguinaria canadensis Stylophorum diphyllum Dendromecon rigida John Myers John Myers John Myers Papaveraceae Papaveraceae Papaveraceae
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Habitat: Open areas on sandy glacial deposits, often in pine barrens (Pinus rigida) Elevation: 10–100 m Generated Map Legacy Map Conn., Fla., Mass., N.J.,
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straight awn; achenes 3-gonous; warm deserts of sw North America Chorizanthe rigida 6 Plants prostrate; involucres campanulate, anterior tooth 1.8-2 mm with
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with a reduced lamina; forms with larger laminae may be confused with A. rigida, but the synoicous condition and the cylindric capsules with a conical operculum
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inaliena (Hooker & Arnott) O. E. Schulz Guillenia lasiophylla M. E. Jones Guillenia rigida Harvey ex Torrey Microsisymbrium lasiophyllum (Hooker & Arnott) K. Brandegee
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Sheldon P. gracilis var. permollis (Rydberg) C. L. Hitchcock P. gracilis var. rigida S. Watson P. indiges P. jucunda P. nuttallii P. nuttallii var. glabrata Lehmann
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scrubby woodlands, often associated with Pinus clausa, P. palustris, P. rigida and xerophytic species of Quercus and Carya Elevation: 10–200 m Generated
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grazing value but low palatability. It is usually less pubescent than H. rigida, the difference being most marked on the lower cauline nodes. None. None
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is a typical member of sect. Ptarmicoidei. The species hybridizes with S. rigida, S. ohioensis, S. riddellii, and perhaps other goldenrods. It is not known
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suggested that M. reverchonii and M. lindheimeri were its parents, but M. rigida seems to be another plausible possibility. None. None. window.propertie
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differentiate in fruit. The author has not come across C. gattingeri var. rigida E. J. Palmer, from Indiana and Kentucky, which apparently differs from the
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coastal plain north of Delaware Bay. Pine-oak forests dominated by Pinus rigida, Quercus stellata, and Q. marilandica dominate the most favorable sites
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vegetation is conspicuously dominated by various species of Pinus, especially P. rigida to the north and P. palustris and P. elliottii to the south. The extensive
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