Julian Alfred Steyermark

Juniperus standleyi is a species of juniper native to Guatemala and the adjacent extreme southeast of Mexico (Volcán Tacaná in Chiapas), where it occurs at elevations of 3,000–4,250 metres (9,840–13,940 feet). Its local common names include huitó, ciprés, and huitum.

Achnopogon is a genus of flowering plants in the family Asteraceae, described as a genus in 1957. The entire genus is endemic to Venezuela. Species Achnopogon steyermarkii Aristeg. - State of Bolívar in southeastern Venezuela Achnopogon virgatus Maguire, Steyerm. & Wurdack - State of Bolívar in southeastern Venezuela

Heliamphora heterodoxa (Greek: heteros = other, doxa = opinion, belief) is a species of marsh pitcher plant native to Venezuela and adjacent Guyana. It was first discovered in 1944 on the slopes interlinking Ptari-tepui and Sororopan-tepui and formally described in 1951. This Heliamphora is closely related to H. glabra and the latter was for a long time considered a form of H. heterodoxa. It is one of four Heliamphora taxa formally described by Julian A. Steyermark. Heliamphora heterodoxa is known to tolerate slightly higher temperatures compared to other Heliamphora species, due to its

Chimantaea is a genus of flowering plants in the family Asteraceae. This genus is endemic to the Pantepui, a biogeographic province on the Guiana Highlands in Venezuela, Guyana, and Brazil. The region is characterized by a pattern of about 50 tepuis, isolated tabletop mountains that arise from the sandstone plateau of the highlands. Tepuis are known for their biodiversity, especially their concentrations of endemic species, and most are still pristine, undisturbed ecosystems. The genus is almost entirely restricted to the Chimantá Massif, a complex of several of these tepuis in Bolívar,

Mortoniodendron is a genus of flowering plants belonging to the family Malvaceae. Its native range is southern Mexico to Colombia. It is also found in Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua and Panamá. Fossils indicate that it has been in its present range since the Miocene. Eocene-aged pollen from Europe and Southern China attributable to the genus indicate a wider distribution in the Northern Hemisphere in the past. The genus name of Mortoniodendron is in honour of Conrad Vernon Morton (1905–1972), an American botanist who did notable writings on Ferns. It was first

Trimezia fosteriana is a species of bulbous plant in the family Iridaceae. Due to the attractive aspect of its leaves and exuberant and delicate yellow flowers, it is widely used in cities in South America for ornamental purposes and gardening. This species is easily confused with Trimezia longifolia, due to the similarity of its yellow flowers. However, the latter species, placed in the genus Neomarica by some sources, is distinguished by the presence of a flattened (leaf-like) flower stem.

Sipaneopsis is a genus of flowering plants belonging to the family Rubiaceae. Its native range is Colombia to Southern Venezuela and Northern Brazil.

Rorippa aquatica (syns. Neobeckia aquatica and Armoracia lacustris), the lakecress or lake cress, is a species of freshwater aquatic flowering plant in the family Brassicaceae. It is found in eastern and central North America, generally in the Great Lakes and Mississippi watersheds. A submerged perennial, it has emergent flowering branches. It is typically found in slow-moving water, such as oxbow lakes. It is used as a foreground aquarium plant, as it is undemanding and very slow-growing.

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Perissocarpa is a genus of flowering plants belonging to the family Ochnaceae. Its native range is Southern Tropical America. Species: Perissocarpa ondox B.Walln. Perissocarpa steyermarkii (Maguire) Steyerm. & Maguire Perissocarpa umbellifera Steyerm. & Maguire

Pagameopsis is a genus of flowering plants belonging to the family Rubiaceae. Its native range is Southern Venezuela to Northern Brazil. Species: Pagameopsis garryoides (Standl.) Steyerm. Pagameopsis maguirei Steyerm.

Orthion is a genus of flowering plants belonging to the family Violaceae. Its native range is Southern Mexico to Colombia. Species: Orthion guatemalense Lundell Orthion malpighiifolium (Standl.) Standl. & Steyerm. Orthion montanum Lundell Orthion oblanceolatum Lundell Orthion subsessile (Standl.) Standl. & Steyerm. Orthion veracruzense Lundell

Neblinathamnus is a genus of flowering plants belonging to the family Rubiaceae. Its native range is Guyana Highlands.

Maguireothamnus is a genus of flowering plants belonging to the family Rubiaceae. Its native range is the Guyana Highlands, between Guyana and Venezuela. The genus name of Maguireothamnus is in honour of Bassett Maguire (1904–1991), an American botanist, head curator of the New York Botanical Garden, and a leader of scientific expeditions to the Guyana Highlands in Brazil and Venezuela. It was first described and published in Mem. New York Bot. Gard. Vol.10 (Issue 5) on page 220 in 1964.

Tepuianthus is a genus of flowering plants belonging to the family Thymelaeaceae. Its native range is Venezuela, Northern Brazil and Colombia. Species: Tepuianthus aracensis Steyerm. & Maguire Tepuianthus auyantepuiensis Maguire & Steyerm. Tepuianthus colombianus Maguire & Steyerm. Tepuianthus sarisarinamensis Maguire & Steyerm. Tepuianthus savannensis Maguire & Steyerm. Tepuianthus yapacanensis Maguire & Steyerm.

Senefelderopsis is a plant genus of the family Euphorbiaceae. It is native to southern tropical America, and found in Colombia, Guyana and Venezuela. The genus was circumscribed by Julian Alfred Steyermark in Bot. Mus. Leafl. vol.15 on page 45 in 1951. The genus name of Senefelderopsis is in honour of Johann Alois Senefelder (1771–1834), who was a German actor and playwright who invented the printing technique of lithography in the 1790s.

Rojasianthe is a genus of Mesoamerican flowering plants in the family Asteraceae. The only known species is Rojasianthe superba, the white sunflower tree, native to Chiapas and Guatemala.

Ouratea brevicalyx is a shrub in the family Ochnaceae, originating in Venezuela.

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Merumea is a genus of flowering plants in the family Rubiaceae. It is native to the Guiana Shield.

Magnolia ptaritepuiana is a species of flowering plant in the family Magnoliaceae. It is endemic to the tepuis, flat-topped mountains in southern Venezuela and southwestern Guyana.

Lindmania holstii is a plant species in the genus Lindmania. This species is endemic to Venezuela.

Ixora yavitensis is a species of shrub or small tree in the family Rubiaceae. It is native to South America.

Greigia ocellata is a plant species in the genus Greigia. It is also perennial. This species is native to Venezuela and Colombia. It is listed as critically endangered by the IUCN.

Carex toreadora is a little-known species of sedge from Ecuador. It was described in 1964 by the prolific plant collector Julian A. Steyermark, having been collected in 1943 at an altitude of 3,785–3,900 metres (12,418–12,795 ft) in Azuay Province. There it grew in "moist mossy boggy places bordering [an] alpine lake". No further collections have ever been made, and the species is listed as endangered on the IUCN Red List. It is classified in Carex sect. Ovales, and is thought to be closely related to species such as Carex mandoniana and Carex macloviana.

Utricularia oliveriana is an affixed aquatic carnivorous plant that belongs to the genus Utricularia (family Lentibulariaceae). It is endemic to South America where it can be found in Brazil, Colombia, and Venezuela.

Utricularia heterochroma is a very small, possibly perennial, rheophytic carnivorous plant that belongs to the genus Utricularia. U. heterochroma is endemic to Venezuela, where it is known from the type location at Ptari-tepui, two collections from Toronó-tepui, one collection from Apacará-tepui, one collection from Serrania Guanay, and several collections from the Chimantá Massif. It grows as a rheophyte on wet sandstone cliffs near waterfalls among mosses at altitudes from 1,760 m (5,774 ft) to 2,450 m (8,038 ft). It was originally described and published by Julian Alfred Steyermark in

Utricularia aureomaculata is a small, probably annual, lithophyte carnivorous plant that belongs to the genus Utricularia. U. aureomaculata is endemic to Venezuela and is only known from three locations: the type location on Ptari-tepui in the Venezuelan state of Bolívar, one other location from Ptari-tepuí, and also from Amaruay-tepui. It grows as a terrestrial lithophyte on moist mossy bluffs. It has been collected in flower in May, October, and November. It was originally described and published by Julian Alfred Steyermark in 1953.

Tecunumania is a genus of flowering plants belonging to the family Cucurbitaceae. The genus was circumscribed by Paul Carpenter Standley and Julian Alfred Steyermark in Publ. Field Mus. Nat. Hist., Bot. Ser.23 on page 96 in 1944. The genus name of Tecunumania is in honour of Tecun Uman (1500? – February 20, 1524), who was one of the last rulers of the K'iche' Maya people, in the Highlands of what is now Guatemala. Its native range stretches from southern Mexico down to Central America. It is found in the countries of Costa Rica, Ecuador, Guatemala and (south-eastern and southwestern) Mexico.

Simira wurdackii is a species of plant in the family Rubiaceae. It is endemic to Peru.