PT - JOURNAL ARTICLE AU - William K Steele TI - Propagation Protocol for Ram’s Head Lady’s Slipper (<em>Cypripedium Arietinum</em>) AID - 10.2979/NPJ.2007.8.1.58 DP - 2007 Mar 20 TA - Native Plants Journal PG - 58--64 VI - 8 IP - 1 4099 - http://npj.uwpress.org/content/8/1/58.short 4100 - http://npj.uwpress.org/content/8/1/58.full SO - NATIVE PLANTS JOURNAL2007 Mar 20; 8 AB - 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.