[1] : The Collaborative International Dictionary of English v.0.48

goat's beard \goat's beard\, goatsbeard \goatsbeard\n. bot.,
   a weedy european annual with yellow flowers, of the genus
   tragopogon; -- so named from the long silky beard of the
   seeds. one species is the salsify or oyster plant; it is
   naturalized in us.

   syn: meadow salsify, shepherd's clock, tragopogon
        pratensis.
        1913 webster + wordnet 1.5
see also:
tragopogon salsify oyster plant tragopogon pratensis 

[2] : The Collaborative International Dictionary of English v.0.48

salsify \sal"sify\ ?; 277, n. f. salsifis. bot.
   see oyster plant
   a, under oyster.
       1913 webster
see also:
oyster plant oyster 

[3] : WordNet (r) 2.0

salsify
     n 1: edible root of the salsify plant syn: oyster plant
     2: mediterranean biennial herb with long-stemmed heads of
        purple ray flowers and milky sap and long edible root;
        naturalized throughout united states syn: oyster plant,
         vegetable oyster, tragopogon porrifolius
     3: either of two long roots eaten cooked
see also:
oyster plant vegetable oyster tragopogon porrifolius 

Salsify >> S Words
Salsify, definition of term: Salsify
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