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campanula:americana [2018/05/03 10:18] (huidige)
Regel 1: Regel 1:
 +===== americana =====
 +===== Campanula americana =====
 + ​L. ​
 +{clear}
 +Tall. B 
 +{clear}
 +===== Twitter =====
 +For regular additions, follow via Twitter **@Klokjesbloem** {https://​twitter.com/​@Klokjesbloem}[{{:​twitter.png?​50|}}]
 +{clear}
 + 
 +===== Habitus =====
 +Erect, simple or few-branched annual or biennial, to 6 ft., glabrous or pubescent.
 +{clear}
 +[{{:​campanula:​tn_c.americana.jpg?​200|Campanula americana flowering - Foto and drawing Herman Berteler}}]
 +[{{:​campanula:​tn_c.americana_3.jpg?​200|Campanula americana to run to seed - Foto and drawing Herman Berteler}}]
 +{clear}
 +Morphological simularities of these taxa to other Nort American Campanulideae may be due to convergence;​ consequently,​ the relationships of these four species (//​Campanula angustifloar//,​ //Campanula exigua//, //Campanula sharsmithiae//​ and //Campanula griffinii//​) are obscure.
 +{clear}
 +
 +===== Leaves =====
 +Stem leaves lanceolate to ovate-elliptic,​ to 6 in. long, narrowed at both ends, serrate. ​
 +{clear}
 +[{{:​campanula:​tn_c.americana_1.jpg?​300|Campanula americana - Foto and drawing Herman Berteler}}]
 +{clear}
 +
 +===== Flowers =====
 +Flowers 1-3 in the axils, in long spikes, calyx lobes linear, to ¾ in. long, corolla blue or white, to 1 in. across, rotate, style 3-lobed. ​
 +{clear}
 +Pantoporate pollen in //​Campanulaceae//​ has previously been known only from //Campanula americana// (Dunbar, 1975). (( :​ref:​nancymorin01 ))
 +{clear}
 +[{{:​campanula:​tn_c.americana_4.jpg?​300|Campanula americana - Foto and drawing Herman Berteler}}]
 +{clear}
 +===== 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}
 +
 +===== Chromosomes =====
 +Only one other //​Campanula//,​ //Campanula americana//,​ which is a virgate annual or biennial, is known to have pantporate pollen.(( :​ref:​nancymorin01 ))
 +{clear}
 +===== Fruit =====
 +Kapsel nahe der Spitze, seltener etwas oberhalb der Mitte sich offnend, 3facherig. Kelchbuchten ohne Anhangen. Sect. II //​Rapunculus//​ Boiss.(( :​ref:​aengler01 )) 
 +{clear}
 +
 +[{{:​campanula:​tn_c.americana_2.jpg?​300|Campanula americana - Foto and drawing Herman Berteler}}]
 +{clear}
 +Seed available, in small quantity. (( :​ref:​alpinaresearch03 ))
 +{clear}
 +
 +
 +===== Living =====
 +Moist, shady places. ​
 +{clear}
 +
 +===== Origin =====
 +Eastern North America
  
campanula/americana.txt · Laatst gewijzigd: 2018/05/03 10:18 (Externe bewerking)