TAB. 18 & 19. 



13. PINUS RIGIDA. 



THREE-LEAVED VIRGINIAN PINE. 



Pmus RIGIDA, folils ternis, strobllis ovatis confertis; squamarum spinis refiexis, vagina foliorum 



abbreviata. 



P. Tseda rigida^. AH. Kezu. v. 3. 368. Wilden. Berl. Bcmm^. 210. 



P. rigida, foliis ternis, conis pyramldatis, confertis; squamis oblongis acutis. Du Roi. Harhk. v. 2. 6o. 

 V/angejih. Beyt. 41 . ..... 



V. rigida, foliis ternis, conis longioribus, squamis rigidioribus. Mill, met. n.\0. 

 P. canadensis trifolia., conis aculeatis. Buhainel. Arh. v.1. 126. n, l6. 

 P. rigida. Marshall, Arh. Amer. \ 01. 



Habitat in America Septentrionali 

 Floret Maio. 



' DESCRIPTIO 



Arbor excelsa. Folia breviora, latiora, &: rigidiora quam in prtecedente, at nervo margineque similia. 

 J^^i?2^ vix semi-unciales, Imbricato-rugosse. Ame7ita mascula cYii^^m^cvX^i, purpureo-lutea, densa; 

 antheraram crista reniformis, repanda, antheris \?i\:xoY\ fasminea ovato-subrotunda. SirohiU aggre^ 

 gati, undiqne patentes, ovati/ magnitudine varii, muricati, spinis reflexis, acutis. 



T 



This Pine grows In Virginia, Maryland, and Pensylvania more abundantly than In districts further 

 northward. Mr. Menzies found it in California, and I have been favoured by that gentleman with a 

 large, full-growm cone gathered on the coast of that country, during his circumnavigation with Captain 

 Vancouver, who brought home an Immense collection of plants and drawings collected In that voyac-e. 

 In growth and strength P. rigida is equal to P. sylvcstris, but the wood Is more spungy, and used for ships, 

 and other buildings, only for want of better. It does not usually inhabit mountainous places, but dry 

 sandy plains. The leaves distinguish the species sufficiently from any other, beino- from two to three 

 Inches long, pointed, smooth on the under surface, and furrowed above ; there are verj^ fine scrratures 

 on the edges, and the whole texture Is strong. The sheaths of the leaves are much shorter than In 

 P. Tieda. in Pensylvania, says Wangenhelm, i\\^ fiowers appear at the beginning of May, and ripe 

 seed Is procured In October. The cones are of a yellowish-brown colour, taperino-^ and a little curved 

 toward the top. Their length Is between three and four Inches. Every scale has a woody point, 

 which is reilexed. There is a variety of this species with smaller cones, some trees of which are irrowino- 

 at Pain's Hill. See PI. XIX. f. 1. 2. 3. 4. 



o 



