TY - JOUR T1 - Propagation Protocol for Ram’s Head Lady’s Slipper (<em>Cypripedium Arietinum</em>) JF - Native Plants Journal JO - NATIVE PLANTS JOURNAL SP - 58 LP - 64 DO - 10.2979/NPJ.2007.8.1.58 VL - 8 IS - 1 AU - William K Steele Y1 - 2007/03/20 UR - http://npj.uwpress.org/content/8/1/58.abstract N2 - Adaptation of tissue culture methods yields vigorous ram’s head lady’s slipper (Cypripedium arietinum Ait. f. [Orchidaceae]) seedlings ready for removal from flasks after 11 to 12 mo. Following vernalization, these seedlings grow into robust green plants that typically bloom 2 to 3 y after outplanting. ER -