Handbook of Plant and Crop Physiology

106 CHONG ET AL.

TABLE 3

Continued

Pretreatment

Stratification (months)

Plant

Collection

Warm

Cold

Species

type

date

Storage

Scarification

(20–30

C)

(1–5

C)

Remarks

Salix discolorS. nigra

Pussy willowSalicaceae

Sambucus canadensis

ElderCaprifoliaceae

Sassafras albidum

SassafrasLauraceae

Sciadopitys verticillata

Umbrella pineTaxodiaceae

Sorbus americana

American mountain ash

S. aucuparia

European mountain ashRosaceae

Symphoricarpos orbiculatus

CoralberryCaprifoliaceae

DTDT DS DT ET DT DT DS

Apr.–MayApr.–MayJune–Aug. Sept. Fall. Aug.–Oct. Sept.–Oct.

4–6 weeks2 years dry at

5°C

2 

years at 5°C

2 years at 5°C

and 10%moisturecontent

2–8 years at 5°C

and 6–8%moisturecontent

2 years at 5°C

10–20 min

H

SO 2

4

instead

of warmstratification.

20–60 min

H

SO 2

4

in place

of or inaddition towarmstratification

(^23) 3–4
NoneNone 3–5
(^4333) 4–6
Very short lived. Viability
10 days at room temp.Sow immediately aftercollection–no dormancy.
Collect fruits as soon as
ripened to avoid birdremoval. Macerate inwater to remove pulp.Alternative to warmstratification isscarification.
See note 5.Collect seeds when color
changes to dark blue.
Remove pulp by maceration.
Fall sow as late aspossible to prevent fallgermination.
See note 5.Collect fruit when just
ripened to avoid birdremoval and to reducepretreatment time.
Soak fruit several days, then
macerate to remove pulp.
See note 4.