Yellow Crocus

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Crocuses are among the most important ornamental geophytes in the global flower industry, [108] ranking sixth in terms of Dutch bulb production (2003–2008) with 463–668 ha under cultivation. [109] The crocus is one of the most popular flowers found in the garden in the late winter and early spring. [20] About 30 of the species are cultivated, among the most popular being C. chrysanthus, C. flavus, C. sieberi, C. tommasinianus and C. vernus, together with hundreds of cultivars derived from them. [20] [8] Both fall and spring blooming crocuses are cultivated for their flowers. [110] Among the first flowers to bloom in spring, their flowering time can vary from fall to the late winter blooming C. tommasinianus; the earliest fall blooming species, C. scharojanii, may flower during the last weeks of July. [111]

From springtime carpets to an autumn full of spice - Crocus are certainly corms to consider. Where to grow CrocusThe genus, as described by Mathew, consisted of two subgenera, Crocirus (monotypic for Crocus banaticus) and Crocus including the remainder of the species, based on whether the anthers were introrse or extrorse ( dehiscence directed towards or away from centre of flower) respectively. Subgenus Crocus was then divided into two sections, Crocus and Nudiscapus, based on the presence or absence of the prophyll. Each section was then further divided into six series of Crocus and nine of Nudiscapus. These series were defined by the division of the style, the corm tunic, flowering time, leaf structure, presence of a bracteole and anther colour. Mathew also introduced the concept of subspecies, including 50 in all, by giving similar but different forms subspecies status if geographically separated, resulting in about 140 distinct taxa. [15] The seven species and ten subspecies discovered since then have been integrated into revisions of this classification, though new species continue to be described, [57] [58] [59] [53] leading to estimates of at least 200 species. [60] [29] Speciation [ edit ] These are planted in late summer, generally September, so if they flower in their first year, it may be a little later than normal. Once settled in, their flowering is triggered by the lower temperatures and higher soil moisture in autumn.

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