Poa pratensis, commonly known as Kentucky bluegrass, smooth meadow-grass, or common meadow-grass, is a perennial species of grass native to practically all of Europe, North Asia and the mountains of Algeria and Morocco. Although the species is spread over all of the cool, humid parts of the United States, it is not native to North America. The Spanish Empire brought the seeds of Kentucky bluegrass to the New World in mixtures with other grasses. Poa pratensis forms a valuable pasture plant, characteristic of well-drained, fertile soil. It is also used for making lawns in parks and gardens and is common in cool moist climates like the Pacific Northwest, and Northeastern United States. When found on native grasslands in Canada, however, it is considered an unwelcome exotic plant, and is indicative of a disturbed and degraded landscape.
In biology, a type is a particular specimen of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralize the defining features of that particular taxon. In older usage, a type was a taxon rather than a specimen.
Anthurium, is a genus of about 1000 species of flowering plants, the largest genus of the arum family, Araceae. General common names include anthurium, tailflower, flamingo flower, and laceleaf.
The following is a defined list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple or compound. The edge of the leaf may be regular or irregular, may be smooth or bearing hair, bristles or spines. For more terms describing other aspects of leaves besides their overall morphology see the leaf article.
Festuca (fescue) is a genus of flowering plants belonging to the grass family Poaceae. They are evergreen or herbaceous perennial tufted grasses with a height range of 10–200 cm (4–79 in) and a cosmopolitan distribution, occurring on every continent except Antarctica. The genus is closely related to ryegrass (Lolium), and recent evidence from phylogenetic studies using DNA sequencing of plant mitochondrial DNA shows that the genus lacks monophyly. As a result, plant taxonomists have moved several species, including the forage grasses tall fescue and meadow fescue, from the genus Festuca into the genus Lolium, or alternatively into the segregate genus Schedonorus.
Nepenthes sumatrana is a tropical pitcher plant endemic to the Indonesian island of Sumatra, after which it is named.
Nepenthes jacquelineae is a tropical pitcher plant endemic to Sumatra. Due to its unique pitcher morphology, it is considered to be one of the most spectacular Nepenthes species native to the island.
Nepenthes tenuis is a tropical pitcher plant endemic to Sumatra. The species was first collected in 1957, from a remote mountain in the western part of the island. It remained undescribed until 1994, and was only rediscovered in the wild in 2002. Prior to this, N. tenuis was known solely from a single photograph and dried herbarium specimen.
Nepenthes ovata is a tropical pitcher plant endemic to Sumatra. The specific epithet ovata is Latin for "ovate" and refers to the shape of the lower pitchers.
Catopsilia pyranthe, the mottled emigrant, is a medium-sized butterfly of the family Pieridae found in south Asia, southeast Asia, and parts of Australia.
Postelsia palmaeformis, also known as the sea palm or palm seaweed, is a species of kelp and classified within brown algae. The sea palm is found along the western coast of North America, on rocky shores with constant waves. It is one of the few algae that can survive and remain erect out of the water; in fact, it spends most of its life cycle exposed to the air. It is an annual, and edible, though harvesting of the alga is discouraged due to the species' sensitivity to overharvesting.
Rumex longifolius, commonly known as the dooryard dock or northern dock, is a perennial species of plant in the genus Rumex.
Gymnopodium is a section within the genus Anthurium. It is composed of the extremely rare Cuban species Anthurium gymnopus. Plants of this section are of somewhat scandent habit, with medium to long internodes, deciduous cataphylls, and somewhat leathery, suborbicular leaf blades. Other notable features include a long inflorescence with a stipitate spadix. The most notable feature is that mature berries contain up to four seeds, rather than the typical two.
Anthurium sect. Porphyrochitonium is a section within the genus Anthurium, which comprises about 250 species. Plants of this section are typified by Anthurium scherzerianum. The most definitive feature of the section is a large, bright red spathe. Other than this distinction, it shares nearly every other characteristic with section Urospadix. Anthuriums that belong to Porphyrochitonium are generally delicate in appearance, bearing slender stems with short internodes and elongated, non-cordate leaf blades which are glandular-punctate on at least one surface. There are one or more well-defined collective veins, and the berries generally have three seeds.
Pachyneurium is a section within the genus Anthurium. It is the largest section, containing the "birdsnest" Anthuriums. Plants of the section are terrestrial, with a rosette growth habit of dense, deeply rooted stems, and long lanceolate to oblanceolate leaves. Leaves are borne on short petioles, and often have waved margins. The most notable characteristic is in the rolling of new leaves. Anthurium of all other sections are rolled in a simple spiral, resembling a conch shell; those of Pachyneurium are rolled in two opposite spirals towards the central rib of the leaf.
A leaf is the principal lateral appendage of the vascular plant stem, usually borne above ground and specialized for photosynthesis. The leaves and stem together form the shoot. Leaves are collectively referred to as foliage, as in "autumn foliage". In most leaves, the primary photosynthetic tissue, the palisade mesophyll, is located on the upper side of the blade or lamina of the leaf but in some species, including the mature foliage of Eucalyptus, palisade mesophyll is present on both sides and the leaves are said to be isobilateral. Most leaves are flattened and have distinct upper (adaxial) and lower (abaxial) surfaces that differ in color, hairiness, the number of stomata, the amount and structure of epicuticular wax and other features. Leaves are mostly green in color due to the presence of a compound called chlorophyll that is essential for photosynthesis as it absorbs light energy from the sun. A leaf with white patches or edges is called a variegated leaf.
Nepenthes naga is a tropical pitcher plant endemic to the Barisan Mountains of Sumatra. It is characterised by a forked sub-apical appendage on the underside of the lid and an undulate lid margin. The specific epithet naga is the Indonesian word for "dragon" and refers to the distinctive lid appendage of this species as well as the large size of its pitchers. The name also references local folklore, which tells of dragons occurring in this species's habitat in the past.
Anthurium andraeanum is a flowering plant species in the family Araceae that is native to Colombia and Ecuador. A winner of the Royal Horticultural Society's Award of Garden Merit, it is one of the plants listed in the NASA Clean Air Study as effective in removing formaldehyde, xylene, toluene, and ammonia from the air.
Petrocardium is an extinct genus of monocot plants in the family Araceae. At present it contains only two species Petrocardium cerrejonense and Petrocardium wayuuorum, the type species. The genus is solely known from the Middle to Late Paleocene, Cerrejón Formation deposits in Colombia.
Peperomia wheeleri is a rare species of flowering plant in the pepper family known by the common name Wheeler's peperomia. It is endemic to Puerto Rico, where it is known only from the island of Culebra. It has been become rare because of deforestation and grazing by livestock. It is a federally listed endangered species of the United States.
