''Polanisia erosa'' is a sticky, high
annual
Annual may refer to:
* Annual publication, periodical publications appearing regularly once per year
**Yearbook
** Literary annual
* Annual plant
* Annual report
* Annual giving
* Annual, Morocco, a settlement in northeastern Morocco
* Annuals (b ...
herbaceous
Herbaceous plants are vascular plants that have no persistent woody stems above ground. This broad category of plants includes many perennials, and nearly all annuals and biennials.
Definitions of "herb" and "herbaceous"
The fourth edition of t ...
species of flowering plant in the ''
Cleome
''Cleome'' is a genus of flowering plants in the family Cleomaceae, commonly known as spider flowers, spider plants, spider weeds, or bee plants. Previously, it had been placed in the family Capparaceae, until DNA studies found the Cleomaceae ge ...
'' family,
Cleomaceae
The Cleomaceae are a small family of flowering plants in the order Brassicales, comprising about 300 species in 10 genera, or about 150 species in 17 genera.Cleomaceae, Zhang Mingli (张明理)1; Gordon C. Tucker2, Harvard.edu/ref> These genera ...
, known by the common name large clammyweed. It has narrow clover-like leaves, and cream-coloured, frilly flowers with a yellowish centre, looking a bit like a small butterfly or a set of elk antlers. It naturally occurs in dry and sandy habitats in Texas and adjacent parts of Arkansas, Louisiana and Oklahoma.
Taxonomy
The American botanist
Thomas Nuttall
Thomas Nuttall (5 January 1786 – 10 September 1859) was an England, English botany, botanist and zoologist who lived and worked in America from 1808 until 1841.
Nuttall was born in the village of Long Preston, near Settle, North Yorkshire, S ...
was the first to describe large clammyweed in 1834, which he placed in a new genus and named ''Cristatella erosa''.
Amos Eaton
Amos Eaton (May 17, 1776 – May 10, 1842) was an American botanist, geologist, and educator who is considered the founder of the modern scientific prospectus in education, which was a radical departure from the American liberal arts tradition of ...
included the species in 1836 in the genus ''Cleome'' as ''C. erosa''. In 1842,
Stephan Endlicher
Stephan Ladislaus Endlicher also known as Endlicher István László (24 June 1804, Bratislava (Pozsony) – 28 March 1849, Vienna) was an Austrian botanist, numismatist and Sinologist. He was a director of the Botanical Garden of Vienna.
Bio ...
, an Austrian botanist who was the director of the
Vienna Botanical Garden moved the species to a new genus and renamed it to ''Cyrbasium erosum'', which is an
illegitimate name
''Nomen illegitimum'' (Latin for illegitimate name) is a technical term, used mainly in botany. It is usually abbreviated as ''nom. illeg.'' Although the International Code of Nomenclature for algae, fungi, and plants uses Latin terms for other ki ...
. In 1958
Hugh Iltis concluded the species could better be assigned to the genus ''Polanisia'', a name that has
priority over ''Cristatella'', since it was already erected by
Constantine Samuel Rafinesque
Constantine Samuel Rafinesque-Schmaltz (; October 22, 1783September 18, 1840) was a French 19th-century polymath born near Constantinople in the Ottoman Empire and self-educated in France. He traveled as a young man in the United States, ultimat ...
in 1819, and made the
new combination
''Combinatio nova'', abbreviated ''comb. nov.'' (sometimes ''n. comb.''), is Latin for "new combination". It is used in taxonomic biology literature when a new name is introduced based on a pre-existing name. The term should not to be confused wi ...
''P. erosa''. Iltis distinguished two subtaxa, the
nominate
Nomination is part of the process of selecting a candidate for either election to a public office, or the bestowing of an honor or award. A collection of nominees narrowed from the full list of candidates is a short list.
Political office
In the ...
and subspecies ''breviglandulosa''.
Description
Large clammyweed is a sticky, unscented annual herb of . It has branched or unbranched, green or purple stems with seated glands and
glandular hairs. The long, green or purple
leaf stalks are often at an angle with the leaf blade. The leaf blade consists of three narrow, long and only wide, somewhat fleshy leaflets, the right and left halves more or less folded towards each other (or
conduplicate
The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular o ...
) with entire margins, a needle-like tip, the underside of the leaf with many, and the upper side with few glands. The
bilaterally symmetrical
Symmetry in biology refers to the symmetry observed in organisms, including plants, animals, fungi, and bacteria. External symmetry can be easily seen by just looking at an organism. For example, take the face of a human being which has a pla ...
flowers are set in gland-covered
raceme
A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...
s that are initially long but that keep growing to when fruits are ripe. Each individual flower is subtended by a
bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...
s consisting of one or three entire bractlets, which have an oval shape and are long. The
stalk of the individual flower is 1−2⅓ cm (0.4-0.9 in) long. The four deciduous, eventually deflected, green to purple coloured, hairless
sepal
A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...
s are
lanceolate
The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular o ...
to
inverted egg-shaped, 2½–3½ mm (0.1–0.14 in) long and ¾–1¼ mm (0.03–0.05 in) wide, with entire margins and a pointy tip. The four petals are mostly creamy white, oblong-ovate, consist of a more yellowish straight and narrow
claw
A claw is a curved, pointed appendage found at the end of a toe or finger in most amniotes (mammals, reptiles, birds). Some invertebrates such as beetles and spiders have somewhat similar fine, hooked structures at the end of the leg or tarsus ...
and a wide
plate
Plate may refer to:
Cooking
* Plate (dishware), a broad, mainly flat vessel commonly used to serve food
* Plates, tableware, dishes or dishware used for setting a table, serving food and dining
* Plate, the content of such a plate (for example: ...
. The forward directed lower (