PINE FAMILY 



43 



Arb. Britt. v(j1. 4, p. 2265, figs. (1838); Engelmanu in Bot. Cal. vol. 2, p. 127. P. Iiihercuhita 

 Don, Trans. Liiin. Soiv vol. 17. p. 442 (1837). 



17. P. tuberculata Gord. Knob-cone Pine. Tree 5 to 30 or sometinie.s 85 

 feet high, with slender trunks % to 1 foot in diameter and rather thin pale 

 yellow-wreen foliage; needles in 3s, 3 to 5 inches long; staminate catkins 

 brownish purple, narrowly conic. 5 to 7 lines long. 50 to 60 in spike-like clusters; 



Flii. 6. PiNUS RADIAT.\ Dou. (I, Open cone; b, seed. nat. size. 



ovulate catkins dark-red or straw-bi"own, on peduncles % to 1 inch long. 3 to 

 5 (or 7) in a whorl, 1 to 3 whorls formed on a season's shoot; cones strongly 

 deflexed. buff in color, narrowly ovate, oblique, acutely or liluntly jidinted and 

 somewhat curved, especially at tip, 3 to 6 inches long; scales moiU'rately thick- 

 ened at tip, except on the outside towards the base where they are raised into 

 conspicuous rounded or pointed knobs ; umbos small and contracted into .slender 

 prickles wliich, on old cones, weather away or persist towards the apex ; seeds 

 brownish black, 3 to 4 lines long, the surface miiuitely roughened, the wing 9 

 to 12 lines long and 3 to -1 lines broad ; cotyledons 5 to 8. 



