Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Louis O. Williams is active.

Publication


Featured researches published by Louis O. Williams.


Fieldiana Botany | 1962

Tropical American plants, IV

Louis O. Williams

Planta parva, epiphytiea; folia elliptiea, bivel triapieulata; infloreseentia uniflora; sepalum dorsale obovatum, breviter eaudato-aeuminatum, 3-nervium; sepala lateralia in laminam obovatam eonnata, eaudato-aeuminata, 5-nervia; petala oblongo-oblaneeolata, aeuminata; labellum multo minus, transverse subquadratum, trilobatum. Small creeping epiphytic plants, the rhizome slender, apparently unbranched, 10 cm long or perhaps longer, closely covered with scarious, infundibuliform, apieulate, sheathing bracts which persist for some time; stems lateral on the rhizomes, terete, unifoliate, covered with bracts like those of the rhizome, 4-5 mm long; leaves one from eaeh stem, elliptic, bior triapieulate at the apex, 15-20 mm long and 4mm broad; inflorescence subterminal on the stem, solitary; pedunele filiform, terete, with a searious, infundibuliform, apieulate braet above the middle and another subtending the single flower, usually with a short ligule (3-4 mm long) from the base of the flower; flowers solitary, greenish yellow; perianth parts all obseurely serrulate and oeellate; dorsal sepal oval or obovate, short eaudate-aeuminate, obscurely 3-nerved, about 10 mm long and 4.5 mm broad; lateral sepals eonnate into one, oval or broadly ovate, short caudate-aeuminate, 5-nerved, about 12 mm long and 6 mm broad; petals essentially oblong-laneeolate, aeuminate, subaurieulate near the base on the lower side and near the middle on the upper side; labellum very small, transversely subquadrate, trilobate with the mid-lobe retuse and the laterals somewhat falcate, with a small, transverse, furfuraeeous eallus plate near the base of the lamina, about 1.5 mm long and 2.5 mm broad when spread; ovary about 5 mm long in flower, in fruit about 10 mm long.


Economic Botany | 1964

Pines in honduras

Louis O. Williams

The pines are an important and interesting group of plants of the northern hemisphere, from the arctic circle to Nicaragua and the West Indies, to north Africa and in the Malayan region. Four of the continents have pines which, in many places, cover large areas and are often the dominant feature of the vegetation. There are perhaps about one hundred different species of pines in the world; some are shrubs no nmre than a meter tall, but most are trees. Pinus ponderosa, the Western Yellow Pine, may reach a height of 75 meters.


Brittonia | 1963

A new miconia (melastomaceae) from Costa Rica

Paul C. Standley; Louis O. Williams

Alton, William. 1789. Hort. Kew. 3: 230. Bailey, F. M. 1891. Contributions to the Queensland Flora. Dept. Agr. Brisbane Bot. Bull. 3: 14. Bentham, George & Hooker, J . D . 1873. Gen. P1. 2: 357. Clausen, J. 1951. Stages in the evolution of plant species. Cornell Univ. Press, Ithaca, N . Y . Coats, Alice M. 1956. Flowers and their histories. (pp. 272-273). P i tman Publ. Corp., N . Y . Darlington, C. D. & Wylie, A . P . 1955. Chromosome atlas of flowering plants. George Allen and Unwin Ltd., London. De Candolle, A . P . 1836. Prodr. Syst. Nat. 5: 532-533, 535-536, 611, 629. Gray, Asa. 1850. Plantae Wrightianae. Smiths. Contr. Knowl. 3: 105. 1886. In S. Watson, Contributions to American botany, XIV. Proc. Amer. Acad. 22: 423. Hemsley, W . B . 1881. Biologia Centrali-Americana. Botany 2: 153. Hoffmann, O. 1894. Compositae, in Engler & Prantl . Natiirl. Pf lanzenfam. 45: 87-387. Jackson, R . C . 1959. In Documented chromosome numbers of plants. Madrofio 15: 52. Linnaeus, Carolus. 1753. Species Plantarum. ed. 1. 920.


Taxon | 1975

The Genus Encyclia in Mexico

Louis O. Williams; Robert I. Dressler; Glenn E. Pollard


Taxon | 1977

Flora of Guatemala

B. L. Turner; Dorothy L. Nash; Louis O. Williams


REVISTA CEIBA | 2016

Dioon Mejiae, a new cycad from Honduras

Paul C. Standley; Louis O. Williams


Archive | 1976

Flora of Guatemala / Dorothy L. Nash, Louis O. Williams ; genera contributed by Kenneth M. Becker ... [et al.].

Dorothy L. Nash; Louis O. Williams


Taxon | 1975

Amphitecna and Dendrosicus Revisited (Bignoniaceae, tribe Crescentieae)

Louis O. Williams


Archive | 1974

Flora of Guatemala / Paul C. Standley, Louis O. Williams, Dorothy Nash Gibson.

Dorothy L. Nash; Paul C. Standley; Louis O. Williams


Taxon | 1973

Flora of Guatemala@@@Flora of Guatemala, Part IX

R. S. Cowan; Paul C. Standley; Louis O. Williams; Dorothy N. Gibson

Collaboration


Dive into the Louis O. Williams's collaboration.

Top Co-Authors

Avatar

Paul C. Standley

American Museum of Natural History

View shared research outputs
Top Co-Authors

Avatar

Paul C. Standley

American Museum of Natural History

View shared research outputs
Researchain Logo
Decentralizing Knowledge