Lacinaria chapmanii var. longifolia Nash Isotype
Lacinaria gladewitzii Farwell Isotype
Lactuca bracyrhyncha Greenman Isotype
Lagascea glandulosa Fernald Isotype
Lagascea helianthifolia var. adenocaulis Robinson Isotype
Lagenocarpus bifidus Gilly Holotype
Lagenocarpus diffusus Gilly Holotype
Lagenocarpus glomeratus Gilly Isotype
Lagenocarpus steyermarkii Gilly Isotype
Lagenophora andina Badilla Isotype
Lagenophora cuchumatanica Beaman & DeJong Holotype
Lamourouxia brachyantha Greenman Isotype
Lamourouxia exserta Robinson & Greenman Isosyntype
Lamourouxia paneroi B. L. Turner Isotype
Lamourouxia pringlei Robinson & Greenman Isotype
Lantana involucrata forma leucocarpa Moldenke Isotype
Lappula cusickii Piper Isotype
Lappula elegans Piper ex. A. Brand Unknown
Lasianthaea beckeri B. Turner Isotype
Lathyrus brownii Eastwood Isotype
Lathyrus hitchcockianus Barneby & Reveal Isotype
Laurentia michoacana Robinson Isotype
Laurentia ovatifolia Robinson Syntype
Lavauxia howardii A. Nels. Isolectotype
Lavauxia palustris Rose Isotype
Layia jonesii Gray Isotype
Lepeostegeres elmeri Merr. Isotype
Lepidium beamanii Rollins Isotype
Lepidium granulare Rose Isotype
Lepidium heterophyllum Jones Unknown
Lepidium lasiocarpum var. rotundum C. L. Hitchcock Isotype
Lepidium utahense Jones Isotype
Leptochloa aquatica Scribner & Merrill Isotype
Leptochloa mexicana Scribner Isotype
Leptochloa nealleyi Vasey Isotype
Leptodactylon lilacinum Greene ex Brand Unknown
Leptosyne pringlei Robinson & Greenman Isotype
Lesquerella foliacea Greene Isotype
Leucelene arenosa A. Heller
Leucophyllum candidum I. M. Johnston Isotype
Leucophyllum langmaniae L. D. Flyr Isotype
Liabum bourgeaui Hieron Isotype
Liabum caducifolium Robinson & Greenman Isotype
Liabum cervinum Robinson Isotype
Liabum glabrum Hemsley Isotype
Liabum klattii Robinson & Greenman Isotype
Liabum pringlei Robinson & Greenman Isotype
Liabum simile McVaugh Unknown
Liatris provincialis Godfrey Isotype
Licaria applanata van der Werff Unknown
Limonium nashii Small Isolectotype
Linum australe Heller Isotype
Linum kingii var. pinetorum Jones Isosyntype
Linum lasiocarpum Rose Isotype
Linum pringlei Watson Isotype
Lippia appendiculata B. L. Robinson & Greenman Unknown
Lippia chrysantha Greenman Isotype
Lippia oaxacana Robinson & Greenman Isosyntype
Lippia rzedowski Moldenke Isotype
Lisianthius nigrescens var. chiapensis Weaver Isotype
Lithophragma austromontana Heller Isotype
Lithospermum oblongifolium Greenman Isotype
Litsea baracatanensis Elmer Unknown
Litsea baruringensis Elmer Syntype
Litsea pedicellata
Litsea pringlei
Lobelia knoblochii Ayers Isotype
Lobelia nelsonii var. fragilis Robinson & Fernald Isotype
Lobelia novella Robinson Isotype
Lobelia picta Robinson & Seaton Isotype
Lobelia pringlei S. Watson Unknown
Lobelia tortuosa Heller Isotype
Lonchocarpus boliviensis Pittier Isotype
Lonchocarpus cruentus Lundell Isotype
Lopezia angustifolia Robinson Isotype
Lopezia pringlei Rose Isotype
Lopezia pringlei Rose Isotype
Lopezia violacea Rose Isotype
Lophanthus cusickii Greenman Isotype
Lozanella trematoides Greenman Isotype
Ludwigia lacustris Eames Isotype
Ludwigia maritima Harper Isotype
Lupinus apertus Heller Isotype
Lupinus arenicola Heller Unknown
Lupinus austromontanus Heller Isotype
Lupinus brachypodus Piper Isotype
Lupinus chionophilus Green ex C.F. Baker Unknown
Lupinus corymbosus Heller Isotype
Lupinus desertorum Heller Isotype
Lupinus elongatus Greene ex C.F. Baker Unknown
Lupinus horizontalis Heller Isotype
Lupinus indutus Greene ex C.F. Baker Unknown
Lupinus lasiotropis Greene Isotype
Lupinus micensis Jones Isosyntype
Lupinus ordoratus Heller Isotype
Lupinus persistens Heller Isotype
Lupinus pringlei Rose Isotype
Lupinus proximus Heller Isotype
Lupinus purpurascens Heller Isotype
Lupinus ruber Heller Isotype
Lupinus shastensis Heller Isotype
Lupinus violaceous Heller Isotype
Lupinus viridifolius Heller Isotype
Lychnis mexicana Rose Isotype
Lycium torreyi var. filiforme Jones Isotype
Lycopodium complanatum var. flabellatum subvar proliferum Farw. Isotype
Lycopodium pringlei Underw. & F. E. Lloyd Isotype