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Orobanche minor, (hellroot, common broomrape, lesser broomrape, small broomrape or clover broomrape), is a holoparasitic angiosperm belonging to the genus ''Orobanche''; a genus of about 150 non-photosynthetic plants that parasitize other autotrophic plants. ==Characteristics and growth requirements== ''O. minor'' grows to and is a perennial. The flowers are hermaphrodite. Common broomrape grows in a wide variety of soils, namely moist, light (sandy), medium (loamy) and heavy (clay) soils that are acid, neutral or basic. It can grow in semi-shade or in full sunlight.〔(Plants for a Future ) Retrieved: 2011-08-07〕 The species appears in a wide range of colours from red-brown, yellow-brown to purple. Yellow specimens are also not uncommon and it's this extreme variability that makes identification on the basis of size or colour uncertain.〔(First Nature ) Retrieved: 2011-08-07〕 Common broomrape is parasitic on various members of the pea (Fabaceae) and daisy (Asteraceae) families. Although widespread, its appearance is sporadic; despite this it can occur in vast colonies from time to time. The main flowering season is from May until the end of August. The species has efficient seed dispersal and is largely inbreeding so that populations preferentially parasitizing a particular species which has its own clear ecological preferences may become effectively isolated and eventually may produce distinct taxa.〔(Watsonia ) Retrieved: 2011-08-07〕 The plants are attached to their host by means of haustoria, which transfer nutrients from the host to the parasite. Only the hemiparasitic species possess an additional extensive root system. The root system is reduced as its function is mainly anchorage of the plant. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Orobanche minor」の詳細全文を読む スポンサード リンク
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