Sedum
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JUJUYENSE   Zardini, 1971

Type : Cabrera & Kiesling 20222, Yala gorge, Dept. Manuel Belgrano, Prov. Jujuy, Argentina, Dec 6, 1969.

Distribution : Argentina (Prov. Jujuy, Dept. Manuel Belgrano & Dept. Tumbaya ; Prov. Salta, Dept. Rosario de Lerma).

 

Description by Guillermo Pino in CSJ US 91(3): 193 - 197. 2019 :

A succulent glabrous herb growing on rocks, forming loose mats up to 10 - 15 cm diam., basally branching, 2 - 10 cm tall in the vegetative state, 8 - 18 (-22) cm tall in the reproductive state.

Basal stem decumbent, 1 - 5 cm long, 1.5 - 1.8 mm thick, grey brownish.

Roots fibrous.

Primary branches 4 - 8, decumbent or curved upwards, rooting along the sides, 5 - 10 cm long, shiny brown.

Vegetative shoots erect, 1 - 6 cm long, flowering shoots 5 - 18 cm long, erect or decumbent, reddish green at base, light green towards apex.

Leaves succulent, spirally attached, first densely imbricate, sessile, oblong, 5 - 10 mm long, 1.5 - 2.2 mm wide, 0.8 - 1.2 mm thick, apex obtuse to rounded, upper side flat to slightly convex in the dry season, both sides convex in the rainy season, dull green with minute black and white spots, margins entire and rounded, section elliptic, base hyaline reddish.

Inflorescence terminal, with 1 - 2 distal short cincinnoid branches 1 - 4 cm long, light green, each branch with 1 - 3 (-6) flowers.

Flowers : Sepals unequal, oblong, slightly incurving, 3 - 5 mm long, colour as leaves, petals 4 - 6 mm long, 2 - 2,5 mm wide, folded outwards at the distal fourth, outside white with a greenish white keel, inside pure white, anthers yellow.

Flowering time : December - January.

 

Note :

Sedum jujuyense is endemic to Argentina and it is also the only endemic Argentinian Sedum. It resembles S. berillonanum and S. incarum from Peru.




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