Gebruikershulpmiddelen

Site-hulpmiddelen


campanula:reverchonii

Verschillen

Dit geeft de verschillen weer tussen de geselecteerde revisie en de huidige revisie van de pagina.

Link naar deze vergelijking

campanula:reverchonii [2012/11/02 19:52] (huidige)
Regel 1: Regel 1:
 +===== reverchonii =====
 +===== Campanula Reverchonii =====
 +Gray (( :​ref:​DonovanStewartCorrell01 )).
 +
 +===== Names =====
 +Basin Bellflower
 +{clear}
 +
 +===== Habitus =====
 +Plant annual, hirsutulous below, glabrous above, to about 3 dm. high; stem erect, slender, cymosely and effusively much-branched,​ angular, usually scabrous on the angles.
 +{clear}
 +===== Morphology =====
 +//Campanula exigua// is also vegetatively similar to //Campanula reverchonii//​ an annual that is endemic to granitic outcrops in central Texas (Shetler, 1963); however, its capsule and seed morphology differ strikingly from those of //Campanula reverchonii//​. Again, convergence rather than close relationship is suggested. (( :​ref:​nancymorin01 ))
 +{clear}
 +
 +===== Leaves =====
 +Leaves sparingly dentate, to about 15mm. long and 5mm. wide, the radical ones spatulate, the cauline leaves lanceolate, those of the upper branches almost filiform and entire.
 +{clear}
 +
 +===== Flowers =====
 +May – july. Flowers and fruits erect on almost capillary elongate peduncles. Calyx lobes narrowly triangular to linear-subulate,​ glabrous, 2-4,5mm. long, blunt-pointed with the tips slightly thickened; corolla light-blue, narrowly funnelform, 9-13mm. long, the tube 4-7mm. long, the ovate-lanceolate lobes shorter than the tube and 6-8mm. wide. Filaments 1.3-1.5mm. long, the proximal third dilated and ciliate; anthers 1.6-2.3mm. long.
 +===== Pollen =====
 +Most European //​Campanula//​ pollen studied to date is 3- to 4-porate (Dunbar, 1975). Most North American //​campanulas//​ (and other North American genera in //​Campanuloideae//​) have pollen that is 5- to 6-porate, the pores equatorial )Chapman, 1966; Chuang, pers. comm., 1978; Morin, unpubl. data). Only //Campanula americana// L., //Campanula exgua//, and //Campanula griffinii// are known to have pantoporate pollen, although pores of //Campanula reverchonii//​ are not strictly equatorial. Small (1903) placed //Campanula americana// in the monotypic genus //​Campanulastrum//,​ and Gadella (1964) supported this decision. There is little morphological similarity between //Campanula americana// (which is a tall, broadleaved annual or biennial with spicate inflorescences and rotate corollas) and the annual California //​campanulas//​. Therefore it seems likely that pantoporate pollen evolved independently in these two groups.(( :​ref:​nancymorin01 ))
 +{clear}
 +
 +===== Fruit =====
 +Flowers and fruits erect on almost capillary elongate peduncles. Capsule ellipsoid or obovoid, 3.5-6mm. long, glabrous, crowned with the erect calyx lobes, opening above the middle.
 +
 +===== Living =====
 +On granite rocks and soils, endemic.
 +{clear}
 +
 +===== Origin =====
 +In the Llano region on the Edwards Plateau.
  
campanula/reverchonii.txt · Laatst gewijzigd: 2012/11/02 19:52 (Externe bewerking)