3$4 PIN E ORDER 



Trisetum Persoon 1805 False Oat 



(Lat. tri-, three, seta, bristle) 



PL 46, fig. 11. 



Spikelets 2-4-flowered, in spike-like or open panicles ; glumes 2, un- 

 equal, acute ; lemma usually shorter than the glumes, 2-toothed, with an awn 

 on the back, palet narrow, 2-toothed ; perennial. 



1. Panicles dense and spike-like, 1-4 in. long; leaves 



1-4 in. long; lower glume 3-nerved T. subspicdtuin 



2. Panicles loose but not spreading; leaves 5-10 in. 



long; lower glume 1-nerved T.montdnum 



PINALES PINE ORDER 

 PINACEAE PINE FAMILY 



Sepals and petals none, stamens scale-like, forming cones several-many 

 in a cluster, pistils scale-like, bearing the ovules exposed on the surface, 

 forming few-many-scaled cones, or berries, fruit a cone with few-many 

 woody, papery or fleshy scales, sometimes a berry ; flowers or cones usually 

 monoecious ; trees or shrubs usually with scale-like or needle-like, evergreen 

 leaves. 



1. Leaves alternate or in clusters 



a. Leaves alternate, scattered ; cones fringed or 



with papery scales 



(1) Leaves square or 4-angled, inserted on 



raised bases ; cones hanging, not fringed Picea 



(2) Leaves flat 



(a) Cones hanging, fringed with 3-lobed 



scales Pseudotsuga 



(b) Cones erect in the top of the tree, not 



fringed Abies 



b. Leaves in clusters or fascicles ; cones with thick. 



woody scales Pinus 



2. Leaves opposite or in whorls of 3 ; cones berry- 



like JUNIPERUS 



Abies Jussieu 1789 Fir 



(The Latin name) 



PL 47, fig. 8, 9. 



Staminate cones axillary, pistillate cones lateral, erect on the topmost 

 branches of the trees, ovules 2 on each scale, the latter with a thin papery, 



