Search results
Results From The WOW.Com Content Network
Rosa hypanthium encircling separate achene fruits. An achene (/ ə ˈ k iː n /; [1] from Ancient Greek ἀ (a) 'privative' and χαίνειν (khaínein) 'to gape'), [2] also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants.
In angiosperms, a hypanthium or floral cup [1] [2] [3] is a structure where basal portions of the calyx, the corolla, and the stamens form a cup-shaped tube. It is sometimes called a floral tube , a term that is also used for corolla tube and calyx tube .
Medinilla magnifica, the showy medinilla [1] or rose grape, [2] is a species of epiphytic flowering plant, of the family Melastomataceae, native to the Philippines.Various cultivars and hybrids of this species, genus and family are well-known and have grown to be popular with plant collectors; the species Medinilla speciosa is equally as popular.
Rosaceae (/ r oʊ ˈ z eɪ s iː. iː,-s i. aɪ,-s i. eɪ /), [5] [6] the rose family, is a family of flowering plants that includes 4,828 known species in 91 genera. [ 7 ] [ 8 ] [ 9 ] The name is derived from the type genus Rosa .
The genus is circumscribed is defined by "a long-tubular hypanthium, an arborescent habit, and a calyx divided into two lobes." [ 1 ] It includes five species native to eastern Africa, Madagascar, the Philippines, New Guinea, and Lesser Sunda Islands.
The bases of the calyx, corolla and stamens are fused to form a hypanthium which is in some cases very short. The ovary is unilocular, at least at the top, with one or two ovules per carpel. The number of carpels is variable. Other characters are generally found in Huerteales, but with the exceptions noted below.
Apple section, showing seeds plus papery expression of the ovary, surrounded by tissue formed from ripening of the hypanthium. The part of apples and pears that is consumed is, in fact, the hypanthium. The ovary is the papery core that surrounds the apple seeds. As the hypanthium ripens it forms the edible tissues. [5]
The carnivorous plant Nepenthes deaniana has pitcher elements that are obconic in shape to capture insects. [2] The hypanthium of the western USA plant Heuchera rubescens has one subspecies with an obconic structure, while several other subspecies have alternative hypantium geometries, so that the obconic characteristic is a subspecies determinant and diagnostic. [3]