Corm at anthesis ± soboliferous, central part narrow, to c. 1 cm diam. at most, with 1 or more ± horizontal, usually shoot-bearing lobes, mostly ± subterete, (1-) 2-5 cm long, 2-5 (-8) mm diam.; tunics membranous, reddish-brown to brown, neck absent. Leaves 2 (-3), synanthous, narrowly Linear to lanceolate-linear, suberect to erecto-patent, often slightly arcuate, extending to c. 7 (-9) cm at anthesis, later± arcuate-patent to procumbent, to 15 (-20) cm x 2-10 (-15) mm, hallowly channelled with distinct midvein, pale to mid-green, glabrous or occasionally ciliolate. Flowers 1-2 (-4); perianth tube exceeding cataphyll by (1-) 2-6 cm yellowish-white occasionally flushed pinkish-purple; limb infundibular, opening stellate, or campanulate-infundibular, segments narrowly oblong to narrowly oblong-elliptic, 1.4-2.5 (-3) cm x 2-5 (-7) mm, subacute to subobtuse, sometimes cucullate, distinctly veined, purplish-pink to bright rose-purple, almost white toward base, upper side sometimes with short white stripe, without lamellae. Outer stamens 6-10 (-11) mm, inner 8-11 (-15) mm; filaments glabrous, white, occasionally flushed purplish-pink, deep greenish-yellow at base; anthers 1.5-2 (-3) mm, usually purplish-brown to -black, occasionally greyish-yellow; pollen yellow. Styles white, straight; stigmas punctiform. Capsules at ground level or occasionally subterranean, ellipsoid-oblong to ellipsoid, 1-1.8 x 0.9-1.3 cm, obtuse, sometimes hirsute.
Restricted to S Peloponnisos (Mani Peninsula) and reported from the island of Kithira.
Stony phrygana slopes, fallow field and olive groves, in terra rossa overlying Limestone, from sea level to 500 (-900) m. Often growing together with Colchicum parlatoris.
Flowering (September-) October to December.
[The name Colchicum zahnii was published in 1900 which predates the publication date of Colchicum psaridis in 2904. This makes C. zahnii the accepted name for this taxon. ] Odile Weber
Heldreich obviously received plants from Psarides, and included them in his Herb. Graec. Norm. as no. 982 under the name C. psaridis Heldr. (nom. nudum), but he was not sure of their exact origin as is apparent from the herbarium label . It is doubtful that they came from a place close to the original locality of C. boissieri Orph. as this is usually a plant from higher altitudes, and C. psaridis is rather common in the foothills of Taigetos. A formal description was provided by Halác y in 1904. According to Zaganiari (1937) the species occur in Kithira.
Plants with broader leave than the type were described as C. zahnii by Heldreicb in the label text of Herb. Graec. Norm. no. 1586. Leaf width is variable in C. psaridis just as in the related C. cupanii Guss., so in recent literature C. zahnii is justifiably included in synonymy.
Above ground C. psaridis is extremely similar to the two-leaved C. cupanii. No absolutely species-exclusive characters for the e two pecies can be defined, apart from the type of underground storage organ, C. cupanii having the usual roundish 'Colchicum type' of corm also at anthesis, and more coriaceous, darker tunics. Possibly, the leaves of C. psaridis are paler, and le s often ciliate; they often also seem thinner and less rigid. Its flower rarely have oblanceolate segments as present in C. cupanii. The species is included in Flora of Turkey (Brickell 1984) but the material cited belongs to C. minutum K. Persson (Persson 1999a). Except for the soboliferous habit, the two species are not really similar. C. minutum has very thin, yellowish-brown tunics, generally 3 (rarely 4) narrow leaves, very small and slender flowers with a narrowly infundibular limb and nearly white to pale purplis-pink segments usually 1.3-4 mm broad, with rather obscure veins, and anthers buff yellow to yellowish-grey.
C. psaridis is a very attractive species and easily propagated on account of it soboliferous habit but it is not particularly hardy in northern Europe and therefore not generally suited for the outdoor garden. It ha to be cultivated in bulb-frames or alpine-house as in Copenhagen and Göteborg.