Genera L

*Denotes species and State of origin for sample(s) with
antitumor activity. Click on the genus name to view plant photos, or
click on the species name (epithet) to see historical data on
recollections of active plants for cancer research.

Laennecia	coulteri			CA/NV
Lagascea	helianthifolia			VER*
Lagerstroemia	indica			GA cult.*
Langloisia	setosissima	var.	setosissima	CA
Lantana	achryanthifolia			TX
Larix	occidentalis			ID
Larrea	tridentata			CA
Lasthenia	californica			CA
Lathyrus	littoralis			CA
Lathyrus	maritimus			AK
Lathyrus	vestitus			S CA
Layia	glandulosa			CA
Layia	pentachaeta	var.	pentachaeta	CA
Ledum	decumbens			AK
Ledum	glandulosum			CA
Ledum	groenlandicum			AK
Leiophyllum	buxifolium			NC*
Lepechinia	spp.			Mexico
Lepidium	flavum			NV CA
Lepidium	lasiocarpum			CA
Lepidium	latifolium			CA
Lepidium	nitidum			CA
Lepidium	montanum			NM
Lepidospartum	latisquamum			NV
Leptarrhena	pyrolifolia			AK
Leptodactylon	caespitosum			UT
Leptodactylon	californicum			CA*
Leptodactylon	pungens			CA
Leptosiphon	androsaceus			CA
Leptosiphon	montanus			CA
Leptosiphon	nutttallii			CA
Lespedeza	bicolor			NC*
Lespedeza	cuneata			NC*
Lesquerella	tenella			CA
Lessingia	lemmonii	var.	ramulosissima	CA
Leucophyllum	candidum			TX
Leucophyllum	frutescens			TX
Leucophyllum	minus			TX
Leucothoe	axillaris			NC*
Lewisia	cotyledon			CA
Liatris	pycnostachya			TX*
Ligusticum	apiifolium			CA
Ligusticum	scoticum			AK
Lilium	washingtonianum	ssp.	purpurascens	CA
Linanthus	androsaceus			CA
Linanthus	nuttallii	ssp.	nuttallii	CA
Linanthus	parviflorus			CA
Linum	lewisii			WY
Linum	neomexicanum			AZ*
Linum	usitatissimum			AZ*
Lippia	graveolens			TX
Lithocarpus	densiflorus	var.	densiflorus	CA
Lithospermum	californicum			CA
Loiseleuria	procumbens			AK
Lobelia	puberula			LA*
Lomatium	caruifolium			CA
Lomatium	dasycarpum			CA
Lomatium	parryi			NV
Lomatium	triternatum			CA
Lomatium	utriculatum			CA
Lonicera	involucrata			UT
Lopezia	semeiandra			JAL*
Lotus	argophyllus	var.	argophyllus	CA
Lotus	crassifolius			CA*
Lotus	humistratus			CA
Lotus	junceus	var.	biolettii	CA*
Lotus	nevadensis			CA
Lotus	pinnatus			CA
Lotus	phlebius			AZ
Lotus	rigidus			CA
Lotus	scoparius	var.	brevialatus	CA*
Lotus	stipularis			CA
Lotus	tomentellus			CA
Ludwigia	alternifolia			GA*
Luetkea	pectinata			AK
Luina	hypolecuca			CA
Lupinus	arbustus			CA
Lupinus	arizonicus			CA
Lupinus	breweri			CA
Lupinus	concinnus			CA
Lupinus	latifolius			CA
Lupinus	sparsifolius			CA
Lycium	andersonii			CA BCN
Lycium	cooperi			CA
Lycium	exsertum			AZ
Lycium	fremontii			AZ
Lycium	megacarpum			BCN
Lycium	pallidum			CA/NV
Lycium	parsihii			BCN
Lycium	puberulum	var.	berberioides	TX
Lycium	shockleyi			NV
Lycium	torreyi			AZ CA TX
Lyonia	lucida			NC*
Lysichiton	americanus			AK
Lysiloma	candida			BCS
Macheranthera	linearis			AZ*
Macheranthera	pinnatifida			TX
Macheranthera	scabrella			TX
Macrosiphonia	macrosiphon			COA*
Madia	elegans			CA
Magnolia	fraseri			NC*
Magnolia	grandiflora			AZ*
Maianthemum	canadennse			NC*
Maianthemum	dilatatum			OR*
Maianthemum	racemosum			CA
Malacothamnus	densiflorus			CA
Malacothamnus	fasciculatus			CA
Malacothamnus	marrubioides			CA
Malacothrix	glabrata			CA
Malacothrix	sonchoides			CA
Malcomia	africana			CA
Malosma	laurina			CA
Malus	domestica			CA
Malva	neglecta			AZ
Malva	parviflora			CA
Marah	fabaceus			CA*
Marah	macrocarpus			CA*
Marah	oreganus			CA*
Marina	parryi			BCS*
Marrubium	vulgare			CA
Mascagnia	macroptera			BCS*
Matelea	caudata			PUE*
Maximowiczia	sonorae			SON*
Maytenus	phyllanthoides			BCS PUE*
Maytenus	texana			TX*
Maytenus	trichotomus			VER*
Megastigma	galeotii			Mexico*
Melampodium	leucanthum			TX
Melia	azedarach			NC*
Melochia	tomentosa			BCS*
Menodora	longiflora			TX
Menodora	spinescens			CA, NV
Mentzelia	albicaulis			CA
Mentzelia	involucrata			CA
Mentzelia	laevigata			CA
Mentzelia	mexicana			TX
Mentzelia	multiflora	ssp.	longiloba	CA
Mentzelia	nitens			CA
Mentzelia	obscura			CA
Menziesia	ferruginea			WA
Merremia	sp.			BCS*
Mertensia	ciliata			CA
Mertensia	paniculata			OR*
Mesembryanthemum	chilense			CA*
Miconia	hemenostigma			OAX*
Micropus	californicus			N CA
Microseris	lindleyi			CA
Microseris	sylvatica			CA
Microsteris	gracilis			CA
Mimosa	aculeaticarpa			NM TX
Mimosa	albida			VER*
Mimulus	aurantiacus			S CA
Mimulus	bigelovii			S CA
Mimulus	longiflorus			S CA
Mimulus	primuloides			CA*
Mirabilis	bigelovii	var.	bigelovii	CA
Mirabilis	multiflora			AZ* NV
Mohavea	brevifolia			CA
Mohavea	confertiflora			CA
Monardella	linoides			CA
Monardella	odoratissima	ssp.	odoratissima	CA
Monolepis	nuttalliana			CA
Monolopia	lanceolata			CA
Monoptilon	bellioides			CA
Montanoa	xanthiifolia			Mexico*
Mortonia	utahensis			CA
Muhlenbergia	asperifolia			TX
Munroa	squarrosa			TX
Myrica	californica			CA*
Myrica	cerifera			AR*
Myrica	faya			HI
Myrica	gale			AK
Nama	demissum	var.	demissum	CA
Nama	harvardii			TX
Nama	hispidum			CA
Nama	rothrockii			CA*
Nama	sp.			BCS*
Narcissus	poeticus			NC*
Narcissus	pseudo-narcissus			WA*
Navarretia	hamosa	ssp.	lepantha	CA
Nemacladus	secundiflrous			CA
Nemophila	menziesii			CA
Nerisyrenia	camporum			TX
Nerium	oleander			TX* AZ*
Nicolletia	occidentalis			CA
Nicotiana	glauca			SON*
Nolina	cismontana			CA
Nolina	microcarpa			NM
Nolina	parryi			CA
Nuphar	luteum			CA NC*
Nymphaea	odorata			NC*
Oemleria	cerasiformis			CA
Oenothera	deltoides			CA
Oenothera	engelmanni			NM*
Oenothera	hookeri			CA*
Oenothera	primiveris			CA
Oenothera	rhombipetala			TX*
Oligomeris	linifolia			CA
Olneya	tesota			CA
Oploplanax	horridum			AK WA*
Opuntia	acanthocarpa			CA
Opuntia	basilaris			SW NV
Opuntia	bigelovii			CA
Opuntia	echinocarpa			CA
Opuntia	fulgida			AZ*
Opuntia	invicta			BCS
Opuntia	parryi			CA
Opuntia	phaecantha			AZ*NV TX
Opuntia	polyacantha	var.	erinacea	NV
Opuntia	pycnantha			BCS
Opuntia	ramosissima			CA
Opuntia	rosarica			BCS
Opuntia	whipplei			AZ
Ornithostaphylos	oppositifolia			BCN
Orobanche	californica			CA
Orobanche	cooperi			BCS*
Orthocarpus	cuspidatus			CA
Orthocarpus	purpurascens			CA
Osmorhiza	brachypoda			CA
Osteomeles	schwerinae			AZ*
Oxystylis	lutea			CA
Oxytheca	dendroides			CA
Oxytropis	campestris			AK
Oxytropis	nigrescens			AK
Pachycereus	marginatus			MIC*
Pachycereus	pringlei			BCN BCS
Pachycereus	schottii			SON*
Pachycereus	weberi			Mexico
Pachycormus	discolor			BCN BCS
Palafoxia	arida	var.	arida	CA*
Palafoxia	arida	var.	gigantea	CA*
Pandorea	jasminoides			CA
Pappophorum	mucronulatum			AZ*
Parathesis	villosa			JAL*
Paxistima	myrsinites			CA*
Pectis	angustifolia			TX
Pectis	papposa			AZ TX
Pectocarya	penincillata			CA
Pectocarya	platycarpa			CA
Pectocarya	recurvata			NV
Pedicularis	bracteosa			CA ID
Pedicularis	contorta			CA
Pedicularis	densiflora			CA
Pedilanthus	palmeri			NAY*
Pediocactus	simpsonii			UT
Peganum	harmala			TX
Peganum	mexicanum			TX
Pellaea	andromedifolia			CA
Penstemon	anguineus			CA
Penstemon	azureus			CA
Penstemon	baccharifolius			TX
Penstemon	cinicola			OR
Penstemon	davidsonii			CA
Penstemon	deustus			CA*
Penstemon	eatonii			NV
Penstemon	floridus			NV
Penstemon	fruticiformis			CA
Penstemon	gracilentus			CA
Penstemon	humilus			CA
Penstemon	incertus			CA
Penstemon	monoensis			CA
Penstemon	nemorosus			WA
Penstemon	newberryi			CA
Penstemon	palmeri			NV CA
Penstemon	parryi			AZ
Penstemon	roezlii			CA
Penstemon	rostriformis			CA
Penstemon	spectabilis			CA
Peraphyllum	ramosissimum			NV
Perideridia	oregana			CA
Perityle	aglossa			TX
Perityle	emoryi			CA
Perityle	megalocephala			NV
Petalonyx	nitidus			NV
Petalonyx	parryi			NV
Petalonyx	thurberi			CA
Petalostemon	candidum			AZ*
Petalostemon	emarginatum			TX*
Petasites	hyperborea			AK
Petrophytum	caespitosum			NV
Petrorhagia	dubia			CA
Peucephyllum	schottii			CA, BCN AZ*
Phacelia	brachyloba			CA
Phacelia	calthifolia			CA
Phacelia	campanularia			CA
Phacelia	cicutaria			CA
Phacelia	ciliata			CA
Phacelia	crenulata	var.	crenulata	CA
Phacelia	crenulata	var.	minutiflora	NV, CA
Phacelia	distans			CA
Phacelia	douglasii			CA
Phacelia	fremontii			CA
Phacelia	hastata			NV
Phacelia	imbricata	ssp.	patula	CA
Phacelia	palmeri			NV
Phacelia	parryi			CA
Phacelia	ramosissima			CA
Phacelia	tanacetifolia			CA
Phaulothamnus	spinescens			BCS*
Philadelphus	lewisii			CA
Phleum	pratense			ID
Phlox	diffusa			CA
Phlox	gracilis			CA
Phlox	longifolia			WY
Phlox	speciosa			CA
Phlox	stansburyi			CA
Pholistoma	auritum			CA
Phoradendron	bolleanum			CA*
Phoradendron	californicum			CA
Phyllodoce	aleutica			AK
Phyllodoce	empetriformis			CA
Physalis	crassifolia			CA*
Physalis	lobata			TX
Physalis	maritima			SC*
Physalis	virginiana			UT*
Physaria	chambersii			NV
Physocarpus	capitatus			WA*
Physocarpus	malvaceus			NV
Physocarpus	opulifolius			MI*
Picea	engelmannii			ID
Pickeringia	montana	var.	tomentosa	CA
Pilostyles	thurberi			TX
Pinus	cembroides			NM*
Pinus	contorta	ssp.	contorta	CA* OR*
Pinus	contorta	ssp.	murrayana	CA
Pinus	lambertiana			CA*
Pinus	monophylla			AZ
Pinus	monticola			CA
Pinus	palustris			NC*
Pinus	rigida			SC*
Pinus	sabiniana			CA*
Pinus	taeda			TX*
Pinus	tecote			OAX*
Piper	jaliscanum			SON*
Piscida	grandifolia	var.	gentryi	PUE*
Plagiobothrys	arizonicus			CA
Plagiobothrys	canescens			CA
Plagiobothrys	hispida			OR
Plagiobothrys	humistratus			CA
Plagiobothrys	jonesii			CA
Plagiobothrys	kingii	var.	harknessii	CA
Plagiobothrys	nothofulvus			CA
Plagiobothrys	tenellus			CA
Plagiomnium	venustum			CA*
Plantago	maritima	ssp.	juncoides	CA* AK
Plantago	ovata			CA
Plantago	subnuda			CA
Plantago	virginica			LA*
Platanthera	dilatata			AK
Platystemon	californicus			S CA
Pleiacanthus	spinosus			UT
Pleurocoronis	pluriseta			CA*
Pluchea	sericea			NV
Podophyllum	peltatum			MD, NC*
Polemonium	foliosissimum			CO*
Polygala	cymosa			NC*
Polygala	macradenia			AZ*
Polygala	pennae			PR
Polygonatum	biflorum			NC*
Polygonella	americana			GA* SC*
Polygonum	alpinum			AK
Polygonum	biflorum			NC*
Polygonum	bistortioides			CA
Polygonum	coccineum			CA*
Polygonum	newberryi			CA*
Polygonum	paronychia			CA*
Polygonum	phytolaccifolium			CA
Polypodium	glycyrrhiza			CA
Polytrichum	pallidisetum			NH
Porophyllum	gracile			CA
Potentilla	anserina			MI*
Potentilla	egedii	ssp.	grandis	AK
Potentilla	fruticosa			AK, CA
Potentilla	glandulosa			CA
Potentilla	gracilis			CA*
Potentilla	multifida			AK
Potentilla	recta			NC*
Potentilla	villosa			AK
Primula	vulgaris			Italy
Probiscidea	altheifolia			BCS
Prosartes	hookeri			ID
Prosopidastrum	mexicanum			BCN
Prosopis	glandulosa	var.	glandulosa	AZ
Prosopis	glandulosa	var.	torreyana	TX
Prosopis	velutina			AZ
Prunus	andersonii			CA
Prunus	emarginata			CA
Prunus	fasciculata			NV
Prunus	fremontii			BCN
Prunus	persica			AZ* CA*
Prunus	virginiana	var.	melanocarpa	NV
Psathyrotes	annua			NV
Psathyrotes	ramosissima			NV
Psathyrotes	scaposa			TX
Pseudobahia	peirsonii			CA
Pseudognaphalium	californicum			CA
Pseudotsuga	menziesii			CA OR
Psilotrophe	cooperi			CA NV
Psilotrophe	tagetina			TX
Psoralidium	lanceolatum	var.	lanceolatum	NV
Psoralidium	lanceolatum	var.	tenuifolium	UT
Psorothamnus	arborescens	var.	minutifolius	CA
Psorothamnus	emoryi			CA
Psorothamnus	fremontii			NV
Psorothamnus	polydenius			CA
Psorothamnus	schottii			CA
Psorothamnus	scoparius			NM
Psorothamnus	spinosus			CA
Psychotria	holtzii			Kenya
Psychotria	lauracea			Kenya
Psychotria	mariana			HI
Psychotria	microdon			PR
Psychotria	oreophila			Kenya
Psychotria	riparia			Kenya
Ptelea	crenulata			CA
Ptelea	trifoliata			AZ
Pteridium	aquilinum			AZ*
Pterospora	andromeda			CA, WA
Pteryxia	terebinthina			CA
Purshia	glandulosa			CA, NV
Purshia	tridentata			CA*
Pyrola	asarifolia			CA
Pyrola	picta			CA
Pyrus	arbutifolia			MI*
Quercus	acutidens			CA
Quercus	albocincta			SON*
Quercus	agrifolia			CA
Quercus	alvordiana			CA
Quercus	arizonica			AZ
Quercus	chihuahuensis			SON*
Quercus	chrysolepis			CA*
Quercus	durata			CA
Quercus	emoryi			NM
Quercus	gambelii			UT
Quercus	garryana	var.	breweri	CA
Quercus	garryana	var.	garryana	CA
Quercus	grisea			NM
Quercus	john-tuckeri			CA
Quercus	kellogii			CA*
Quercus	lobata			CA
Quercus	pungens			TX
Quercus	sadleriana			CA
Quercus	vaccinifolia			CA
Quercus	welshii			UT
Quercus	wislizenii			CA