Handbook of Plant and Crop Physiology

82 CHONG ET AL.

TABLE 2

Continued

Medium temperature (

C)

Plant

Posttransplant

Days to

Light or

Species

type

Germination

(night)

germinate

dark

Pretreatment

Remarks

None if fresh.

Stratify storedseed 20–24

C 2–4

wk then 3–5

C

4–6 wk

Soak in water 24 hrScarify with

sandpaper or file,or soak in warmwater for 2 days

Stratify 3–5

C 3

months

5–10 14–18 8–108–10 8–188–188–18^30 8–12 14–21 14–2110–1410–14

Ligularia dentata

Golden rayAsteraceae

Limonium sinuatum

StaticePlumbaginaceae

Linaria maroccanaL. vulgaris

Toad flaxScrophulariaceae

Linum grandiflorumL. perenneL. flavum

FlaxLinaceae

Liriope

spp.

Lily-turfLiliaceae

Lisianthus russellianus (Eustoma

grandiflora)Prairie gentianGentianaceae

Lithodora diffusa

LithodoraBoraginaceae

Lobelia erinusL. cardinalisL. siphilitica

LobeliaLobeliaceae

P A AP-W AP P P A P AP-WP-W

20–24

21

18–2118–21 18–2115–1818–21 18–21 21–24

20 242121

15–18

18 1313 101010 18 16

10–1310–13

D D LL L L LL L

Fresh seed recommended.

Dormancy sets in quickly(2 wk after seed harvest).When sown outdoors,germination may occur 1–2years later.

Reduce night temp. of

medium by 3

C for best

germination.

Seedlings grow slowly.