Spring Flora of Ohio. 



I. Order CO-NIF'-ER-/E. PINE FAMILY.— Trees or shrubs, resinous, 

 leaves mostly evergreen ; scale-like, subulate, or needle-shaped; flowers 

 jiever perfect, the ovules naked ; fruit a cone, dr}- or berry-like. 



KEY TO THE GENERA. 



Leaves scale-like and adnate, or free and awl-shaped fa:. 

 Leaves scattered, linear, 'i-ranked, flat, green both sides \h). 



Leaves 2-5 in a cluster, surrounded by a sheath Phi its. 1 



Leaves fascicled, very many in a cluster, deciduous Larix. 2 



Leaves scattered, petioled, flat, tuhitened beneath Tsuga. 3 



■a. Leaves 2-ranked ; fruit a cone with a few scales Thi<ya. 4 



.a. Leaves not 2-ranked ; fruit berry-like .Jmiipei-iis. 5 



b. A straggling bush ; fruit berry-like nearly enclosing the seed . . . Taxus. 



1. Genus PI'-NUS. — Trees or shrubs with evergreen needle- 

 shaped, semi-cylindrical or triangular leaves, 2-5 in a sheathed fas- 

 •cicle: fruit a cone with woody scales; seeds winged. 



Pi'-nus stro'-bus L. White Pine. -A large tree with soft slender (/lt/^'~>^ 

 glaucous leaves in fives; scales of the long cone slightlv thickened at 

 the end, without prickle or point. 



Pi'-nus rig'-i-da Mill. Pitch Pine. —Leaves in threes, o-o in. long 

 from short sheaths; scales of the cone with a short stout recurved 

 prickle. 



Pi'-nus vir-gin-i-a'-na Mill. (P. iuops Ait.) Jersey Pine; Scrub Pine.-- 

 Leaves in twos, short, l!2-<> in. long; scales of cone tipped with a 

 straight or rectirved prickle; a shrub or tall tree. 



2. Genus LAR'-IX. — Leaves needle-shaped, soft, deciduous, many 

 in a fascicle ; cones Yz-^i in. long, scales few, rounded. 



Lar'-ix lar-i-ci'-na (Du Roi) Koch. (/,. ainericana Mx.) Tamarack ; 

 American Larch : Black Larch. — A slender tree, growing chiefly in 

 swamps. Northward. 



