> > > > Re: Fwd: PBS website contact:///Lycoris/ (Tony Avent) > Can some of you who have trouble with vernalizing lycoris (e.g Lycoris > sanguinea and any others that don't readily bloom for your 'too warm' local > conditions) conduct an experiment for me? How about putting ice chips on > top of the site where the lycoris bulbs are planted. It's supposed to work > for peonies, and is a commodity readily available. It may be worth the > effort, and the information you could provide would be of value to others. > > Jonathan Knisely > New Haven, CT USDA 6a > ---------------------------------------------------------------------- > > > Hi Tony, > > Thank you for the excellent information. Besides watering issues, the > primary problem with growing the spring-emerging species at lower > elevations in Northern California is the lack of cold vernalizing > winter temperatures. For example, with our minimum low temps only in > the mid 20's F, in order to achieve flowering, I grow L. x squamigera > in exposed pots that aren't exposed to winter sunlight. How do you > rate the spring-emerging species with regard to their need for > vernalization relative to L. x squamigera? L. chinensis and L. > sprengeri probably need less cooling? > > Best regards, > Nathan > > > At 01:47 PM 9/12/2018, you wrote: > >Hi Jane; > > > >Hopefully this will help. > > > >Based on the extensive body of DNA research, and confirmed in our > >field trials, there are only 7 lycoris species, with 1 still tbd...a > >far cry from the 13-20 often cited. > > > >Two of the lycoris species have foliage that emerges in fall, and > >five have foliage that emerges in late winter/early spring. Because > >all lycoris are winter-growing, the foliage emergence times > >determines their ability to withstand winter cold. Areas with > >extremely cold temperatures in early fall that remains so all winter > >may actually delay foliage emergence, making the plant more winter > >hardy than in conditions with fluctuating winter temperatures. > > > >Those species with fall-emerging leaves are generally winter-hardy > >to Zone 7....some clones slightly more, some slightly less. > >Fall foliage (zone 7) > >Lycoris aurea > >Lycoris radiata > > > >Those species with spring-emerging leaves are generally winter-hardy > >to Zone 5, possibly colder > >Spring Foliage (Zone 5) > >Lycoris chinensis > >Lycoris longituba > >Lycoris sanguinea > >Lycoris shaanxiensis (virtually everything in commerce is x > >straminea) with fall foliage > >Lycoris sprengeri > > > >Tbd > >Lycoris guangxiensis > > > >All other lycoris are hybrids. Hybrids of two spring-leaf species > >retains the Zone 5 hardiness, but crosses of a spring-leaf and a > >fall-leaf species, always produces offspring with fall foliage, so > >the hardiness of these always reverts to Zone 7. In theory, crosses > >with two spring species and one fall species could delay leaf > >emergence enough to increase winter hardiness. > > > >Lycoris Hybrids > >Many of these names are long established, most originally published > >as species, which DNA has shown to be hybrids. Other names are > >unpublished and only used by us as working names for the hybrids we grow. > > > >Fall x Fall (Zone 7) > >Two species hybrids > >x albiflora (syn: L. elsiae) - aurea (fall) x radiata (fall) > > > >Spring x Spring (Zone 5) > >Two species hybrids > >x caldwellii - chinensis (spring) x longituba (spring) > >x chejuensis - chinensis (spring) x sanguinea (spring) > >x flavescens - chinensis (spring) x sanguinea (spring) > >x incarnata (same as x squamigera) > >x sprenguinea (unpublished) - sprengeri (spring) x sanguinea (spring) > >x sprengensis (unpublished) - sprengeri (spring) x chinensis (spring) > >x squamigera (same as elegans, incarnata) - - longituba (spring) x > >sprengeri (spring) > > > >Fall x Spring (Zone 7) > >Two species hybrids > >x chinaurea (unpublished)- aurea (fall) x chinensis (spring) > >x cinnabarina - aurea (fall) x sanguinea (spring) > >x rosea (same as jacksoniana) - radiata (fall) x sprengeri (spring) > >x sprengurea - aurea (fall x sprengeri (spring) > >x straminea (syn: houdyshelii) - radiata (fall) x chinensis (spring) > >x rubroaurantiaca - undetermined by DNA > > > >Three species hybrids (2 spring x 1 fall) > >x longitosea (unpublished) - longituba (spring) x sprengeri (spring) > >x radiata (fall) > >x roseguinea (unpublished) - radiata (fall) x sprengeri (spring) x > >sanguinea (spring) > >x rosensis (unpublished) - radiata (fall) x sprengeri (spring) x > >chinensis (spring) > > > >Three species hybrids (2 fall x 1 spring) > >x radichinaurea (unpublished) - radiata (fall) x aurea (fall) x > >chinensis (spring) > >x rosaurea (unpublished) - radiata (fall) x aurea (fall) x sprengeri > (spring) > > > > > >Tony Avent > >Proprietor > > _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…