Cistanthe grandiflora (Lindl.) Schltdl., Hort. Hal. 1: 10 1841. (syn: Calandrinia discolor Schrad.; Calandrinia elegans Hort. ex Vilm.; Calandrinia glauca Schrad. ex DC.; Calandrinia grandiflora Lindl.; Calandrinia lindleyana Hort. ex Vilm.; Calandrinia speciosa Lehm.; Cistanthe anceps Spach; Cistanthe discolor (Schrad.) Spach; Cistanthe glauca Spach ex Heynh.; Cistanthe grandiflora (Lindley) Carolin ex M. A. Hershkovitz; Cistanthe speciosa (Lehm.) Lilja ex Heynh.; Claytonia discolor (Schrad.) Kuntze; Claytonia grandiflora (Lindl.) Kuntze; Claytonia speciosa (Lehm.) Kuntze; Rhodopsis discolor (Schrad.) Lilja; Tegneria discolor (Schrad.) Lilja);
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Chile (Coquimbo, Valparaiso, O’Higgins, Maule, Bio Bio, Araucania, Reg. Metropolitana) as per Catalogue of Life;
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Cistanthe grandiflora from California-GS08022021-1
4 images.

Cistanthe grandiflora (Lindl.) Schltdl.

(syn: Calandrinia grandiflora Lindl.

Common name: Rock Purslane

Perhaps no two species are confused so much as Calandrinia grandiflora and C. spectabilis, even listed as synonyms are considered synonyms in several websites due to very similar flowers,  but in reality they are so distinct that they are placed in two different genera now. They can be differentiated as below:

Calandrinia spectabilis Otto & A.Dietr.: Leaves 3-5 cm long, rhombic tp spathulate, light green,  inflorescence ca 60 cm tall, leaves and sepals with elongate unicellular hairs, sepals distinctly angular or keeled, capsules valves reflexed after dehiscence, margins involute. 

Cistanthe grandiflora (Lindl.) Schltdl. (syn: Calandrinia grandiflora Lindl.: Leaves 12-20 cm long, narrowly elliptic narrowed into broad petiole, with acute apex, ,  grey green, elongate hairs absent on leaves and sepals, sepals not distinctly keeled, capsule valves not reflexed after dehiscence, margins not involute.

Sharing Cistanthe grandiflora from Summerwinds nursery, Sunnyvale, California, photographed on 20-7-2014.


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Cultivated garden flowers seen in San Francisco on 1/10/14.

Unfortunately, these are the only pictures I have and only these stalks were visible from where the pictures were taken.


Calandrinia sp. [Portulacaceae].


Thanks a lot for the id.

It would have been difficult for me to guess this one.

On searching, the pictures resemble Calandrina spectabilis, common name Rock Purslane.


It is difficult to confirm identification without leaves. Strangely Calandrinia grandiflora and C. spectabilis are considered synonyms in several websites due to similar flowers but in reality they are so distinct that they are placed in two different genera now. They can be differentiated as below:
Calandrinia spectabilis Otto & A.Dietr.: Leaves 3-5 cm long, rhombic tp spathulate, light green,  inflorescence ca 60 cm tall, leaves and sepals with elongate unicellular hairs, sepals distinctly angular or keeled, capsules valves reflexed after dehiscence, margins involute. 
Cistanthe grandiflora (Lindl.) Schltdl. (syn: Calandrinia grandiflora Lindl.: Leaves 12-20 cm long, narrowly elliptic narrowed into broad petiole, with acute apex, ,  grey green, elongate hairs absent on leaves and sepals, sepals not distinctly keeled, capsule valves not reflexed after dehiscence, margins not involute.
Looking at sepals I would say Cistanthe grandiflora.


 


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References: POWO  Catalogue of Life  The Plant List Ver.1.1  IPNI
https://inlandvalleygardenplanner.org/plants/cistanthe-grandiflora/
https://www.slobg.org/cistanthe-grandiflora-calandrinia-spectabilis
https://www.smgrowers.com/products/plants/plantdisplay.asp?plant_id=2922

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