OccurrenceID	SequenceNumber	Family	ScientificName	NothoGenus	Genus	NothoSpecies	SpecificEpithet	SpecificAuthors	InfraspecificRank	NothoInfraspecies	InfraspecificEpithet	InfraspecificAuthors	Cultivar	TypeDesignation	HolotypeLocation	YearPublished	Publication	Notes
2311634	1	Hydrophyllaceae	Romanzoffia thompsonii		Romanzoffia		thompsonii	Marttala						Paratype	NY	1996	Madroño 43(3): 405.	
2320191	1	Asteraceae	Dimeresia howellii		Dimeresia		howellii	A. Gray						Isosyntype	GH	1886	Synoptical Flora of North America 1: 449.	
2320195	1	Asteraceae	Erigeron nudatus		Erigeron		nudatus	A. Gray						Isotype		1885	Proceedings of the American Academy of Arts and Sciences 20: 297.	
2320234	1	Asteraceae	Erigeron poliospermus		Erigeron		poliospermus	A. Gray						Isosyntype	GH (lectotype)	1884	Synoptical Flora of North America 1: 210.	
2320317	1	Asteraceae	Haplopappus howellii		Haplopappus		howellii	A. Gray						Isosyntype	GH (lectotype)	1886	Synoptical Flora of North America 1: 446.	
2320425	1	Brassicaceae	Arabis howellii		Arabis		howellii	S. Watson						Isotype	GH?	1890	Proceedings of the American Academy of Arts and Sciences 25: 124–125.	
2320433	1	Brassicaceae	Arabis purpurascens		Arabis		purpurascens	Howell						Isotype		1888	Pittonia 1: 161-162.	
2320447	1	Brassicaceae	Cardamine sinuata		Cardamine		sinuata	Greene						Isotype	US?	1893	Erythea 1: 148.	
2320449	1	Brassicaceae	Cardamine gemmata		Cardamine		gemmata	Greene						Isotype		1888	Pittonia 1: 162.	
2320480	1	Brassicaceae	Lepidium oreganum		Lepidium		oreganum	Howell ex Greene						Isotype		1891	Flora Franciscana 2: 274.	
2320506	1	Brassicaceae	Thelypodium eucosmum		Thelypodium		eucosmum	B.L. Rob.						Isosyntype	GH	1895	Synoptical Flora of North America 1(1[1]): 175.	Probable isosyntype. Has same collection date as syntype cited in protologue, but locality is given as Canyon City instead of "Blue Mountains" as cited in protologue. However, in "Flora of Northwest America" (1903), Howell cites Nevius\' syntype as in protologue, but cites his own collection as "near Canyon City", as indicated on this specimen label.
2320507	1	Brassicaceae	Thelypodium flexuosum		Thelypodium		flexuosum	B.L. Rob.						Isosyntype		1895	Synoptical Flora of North America 1(1[1]): 175.	
2320508	1	Brassicaceae	Thelypodium howellii		Thelypodium		howellii	S. Watson						Isosyntype		1886	Proceedings of the American Academy of Arts and Sciences 21(2): 445.	
2320557	1	Caryophyllaceae	Arenaria howellii		Arenaria		howellii	S. Watson						Isotype		1885	Proceedings of the American Academy of Arts and Sciences 20: 354–355.	
2320564	1	Caryophyllaceae	Arenaria pusilla		Arenaria		pusilla	S. Watson						Isosyntype		1882	Proceedings of the American Academy of Arts and Sciences 17: 367.	
2320598	1	Caryophyllaceae	Silene scaposa		Silene		scaposa	B.L. Rob.						Isosyntype		1893	Proceedings of the American Academy of Arts and Sciences 28: 145.	
2320599	1	Caryophyllaceae	Silene scaposa		Silene		scaposa	B.L. Rob.						Isosyntype	?	1893	Proceedings of the American Academy of Arts and Sciences 28: 145.	One of 2 syntypes cited in protologue.
2320812	1	Grossulariaceae	Ribes acerifolium		Ribes		acerifolium	Howell						Isosyntype		1895	Erythea 3: 34–35.	
2320879	1	Liliaceae	Calochortus howellii		Calochortus		howellii	S. Watson						Isoparalectotype		1888	Proceedings of the American Academy of Arts and Sciences 23(2): 266–267.	One of two duplicate specimens at HPSU (other is 8937). 
2320880	1	Liliaceae	Calochortus howellii		Calochortus		howellii	S. Watson						Isoparalectotype	G	1888	Proceedings of the American Academy of Arts and Sciences 23(2): 266–267.	One of two duplicate specimens at HPSU (other is 8936).
2320883	1	Liliaceae	Calochortus subalpinus		Calochortus		subalpinus	Piper						Isotype	US	1906	Contributions from the United States National Herbarium 11: 195.	
2320920	1	Liliaceae	Erythronium citrinum		Erythronium		citrinum	S. Watson						Isotype	US?	1887	Proceedings of the American Academy of Arts and Sciences 22(2): 480.	
2320926	1	Liliaceae	Erythronium hendersonii		Erythronium		hendersonii	S. Watson						Isosyntype	US?	1887	Proceedings of the American Academy of Arts and Sciences 22(2): 479–480.	
2320929	1	Liliaceae	Erythronium howellii		Erythronium		howellii	S. Watson						Isotype	US?	1887	Proceedings of the American Academy of Arts and Sciences 22(2): 480. 1887.	
2320930	1	Liliaceae	Erythronium montanum		Erythronium		montanum	S. Watson						Probable isosyntype	US?	1891	Proceedings of the American Academy of Arts and Sciences 26: 130.	Howell cited in protologue, but collections not specified.
2320948	1	Liliaceae	Lilium bolanderi		Lilium		bolanderi	S. Watson						Isosyntype	GH	1885	Proceedings of the American Academy of Arts and Sciences 20: 377.	
2321007	1	Melanthiaceae	Trillium rivale		Trillium		rivale	S. Watson						Isosyntype	US?	1885	Proceedings of the American Academy of Arts and Sciences 20: 378.	
2321323	1	Polygonaceae	Eriogonum montanum		Eriogonum		montanum	Howell						Possible type			A Flora of Northwest America 6: 570. 1902.	Possible type specimen for Eriogonum montanum Howell, but no collections cited in protologue.
2321325	1	Polygonaceae	Eriogonum montanum		Eriogonum		montanum	Howell						Possible type			A Flora of Northwest America 6: 570. 1902.	Possible type specimen for Eriogonum montanum Howell, but no collections cited in protologue.
2321434	1	Ranunculaceae	Caltha howellii		Caltha		howellii	(Huth) Greene						Isosyntype		1899	Pittonia 4: 79.	
2321472	1	Ranunculaceae	Myosurus apetalus var. lepturus		Myosurus		apetalus	Gay	var.		lepturus	A. Gray		Isosyntype	GH?	1886	Bulletin of the Torrey Botanical Club 13: 2–3.	Probable isosyntype.
2321473	1	Ranunculaceae	Myosurus sessilis		Myosurus		sessilis	S. Watson						Isotype		1882	Proceedings of the American Academy of Arts and Sciences 17: 362.	
2321501	1	Ranunculaceae	Ranunculus hispidus var. oreganus		Ranunculus		hispidus	Michx.	var.		oreganus	A. Gray		Isosyntype		1886	Proceedings of the Amercan Academy of Arts and Sciences 21: 376	
2321518	1	Ranunculaceae	Ranunculus triternatus		Ranunculus		triternatus	A. Gray						Isotype		1886	Proceedings of the American Academy of Arts and Sciences 21: 370.	
2321535	1	Rhamnaceae	Rhamnus occidentalis		Rhamnus		occidentalis	T.J. Howell ex Greene						Isotype		1889	Pittonia 2: 15.	Type locality described in Howell\'s Flora of Northwest America, 1897
2321548	1	Rosaceae	Spiraea occidentalis		Spiraea		occidentalis	S. Watson						Isotype		1883	Proceedings of the American Academy of Arts and Sciences 18: 192–193.	
2321854	1	Violaceae	Viola howellii		Viola		howellii	A. Gray						Isotype	GH?	1887	Proceedings of the American Academy of Arts and Sciences 22: 308.	See also: Botanical Gazette 11: 293. 1886.
2321858	1	Violaceae	Viola primulifolia var. occidentalis		Viola		primulifolia	L.	var.		occidentalis	A. Gray		Isotype	GH?	1886	Botanical Gazette 11: 255.	
3249891	1	Isoetaceae	Isoetes howellii		Isoetes		howellii	Engelm.						Isotype	MO	1882	 Transactions of the Academy of Science of St. Louis 4: 385.	
3591615	1	Brassicaceae	Nasturtium sinuatum var. pubescens		Nasturtium		sinuatum	Nutt. ex Torr. & A. Gray	var.		pubescens	S. Watson		Isotype		1895	Synoptical Flora of North America 1(1[1]): 147.	
3591616	1	Asparagaceae	Hastingsia bracteosa		Hastingsia		bracteosa	S. Watson						Isotype		1885	Proceedings of the American Academy of Arts and Sciences 20: 377.	
3591617	1	Apiaceae	Velaea glauca		Velaea		glauca	J.M. Coult. & Rose						Isosyntype	MO	1895	Contributions from the United States National Herbarium 3(5): 321, pl. 14.	
3591618	1	Asparagaceae	Camassia howellii		Camassia		howellii	S. Watson						Isotype		1890	Proceedings of the American Academy of Arts and Sciences 25: 135.	
3591619	1	Asparagaceae	Camassia howellii		Camassia		howellii	S. Watson						Isotype		1890	Proceedings of the American Academy of Arts and Sciences 25: 135.	
3754417	1	Valerianaceae	Plectritis gibbosa		Plectritis		gibbosa	Suksd.						Isosyntype		1927	Werdenda 1 (3–4): 43.	
