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+===== 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.