Key to the Gymnosperms of the Southeastern U.S. -
Key to the Pines (Pinus)
Cone scales lack prickles, or with prickles less than 3 mm. long


Needles are 2-5 cm. (3/4 - 2 in.) long,1-2 mm.
(0.04 - 0.08 in.) wide; seed cone scales
are unarmed or have small, reflexed tips -
Jack pine (Pinus banksiana)

OR

Needles are 3-10 cm. (1 1/8 - 4 in.) long,1 mm.
(0.04 in.) or less wide; seed cone scales are
mostly armed with small, slender prickles -
Sand pine (Pinus clausa)

Hand lens
Seed cone scales unarmed or with small reflexed tips (close-up image) Seed cone scales unarmed or with small reflexed tips Seed cone scales armed with small slender prickles Seed cone scales armed with small slender prickles (close-up image)
Scale bar
Scale bar Scale bar
Scale bar
Here are the choices you've made so far:
Definitions of terms on this page: