PHYTOLACC A, POGONIA. 401 



late, narrowing gradually, flat ; margins rough ; corymbs panicled : divis- 

 ions of the corolla rounded : calyx awned. Cultivated. 2 3 f. 5. 



subula'ta (mountain pink. O. r. M. 4), caespitose, white pubescent : leaves li- 

 near, pungent, ciliate : corymbs few flowered : pedicels 3 cleft : divisions of 

 the corolla wedge-form, emarginate ; teeth of the calyx subulate, scarcely 

 shorter than the tube of the corolla. Cultivated. 3 6 i. S. 

 1010. PHYTOLAPCA. 54. 29. 



decan"dra (poke-weed. O. w. Ju. 4), leaves ovate, acute at both ends : flowers 

 racemed : berries ilattened at the ends. 3 6 f. <S. 

 1916. PINUS. 51. 100. 



1. Leaves solitary, with separate bases. ABIES. 



canaden"sis (hemlock tree. O. M. V ), leaves flat, denticulate, 2 ranked : stro- 

 biles ovate, terminal, scarcely longer than the leaves. The bark is used in 

 tanning leather. S. 



2. Leaves many, sheathed at the base. PINUS. 



(Leaves in pairs.) 



resino'sa (yellow pine, norway pine, red pine. O. M, ^ ), leaves and sheaths 

 elongated = strobiles ovate-conic, rounded at the base, sub-solitary, about 

 half as long as the leaves : scales dilated in the middle, unarmed. Bark of 

 a reddish colour, and much smoother than the rigida and strobus. Often 

 grows very tall and straight. S. 



(Leaves in threes.) 



rig"ida (pitch pine. O. M. > ), leaves with abbreviated sheaths ; staminate 

 aments erect-incumbent : strobiles ovate, scattered or aggregated : spines of 

 the scale reflexed. Though very common, it grows the most plentifully on 

 barren sandy plains. -S. 



3. Leaves many, in a fascicle. LARJX. 



pen"dula (black larch, tamarack, hack-matack. O. M. > ), leaves deciduous : 

 strobiles oblong : margins of the scales inflexed : bract guitar-form, with a 

 slender point. 



1610. PISUM. 32. 93. ' 



Exotic. 



sati'vum (pea. p. w. J. ), petioles terete : stipules round and crenate at the 

 base : peduncles many-flowered. Var. umbellatum (boquet pea), has the 

 stipules 4 cleft, acute. Var. quadratum (quadrate pea), fruit ash-colour, 4 

 sided. Var. humile (dwarf pea), stem erect, not climbing : leafets roundish. 



41. PLANTAGO. 54. 31. 



ma'jor (plantain. O. w. J. 4), leaves ovate, sub-dentate, sub-glabrous : scape 

 terete : spike oblong, imbricate. 6 24 i. S. 



2013. PLATANUS. 50. 99. 



ocddenta"lis (button wood, american plane-tree, false sycamore. O. J. S), 

 leaves quinquangular, obsoletely lobed, toothed, pubescent beneath : stem 

 and branches becoming white. Grows to a greater size than any other tree 

 in America'. 



32. POA. 4. 10. 



Eaton observes, " the word poa is pure Greek, and signifies pasture or fodder. 

 Linnaeus applied the name to this genus, because it includes the most common 

 pasture grass and meadow grass. The poa pratensis, aided by the agrostic 

 vulgaris, constitutes most of those beautiful carpets which cover our fields, 

 lawns, and road-sides." 



an"nua(Aip. ), panicle sub-secund, divaricate : spikelets ovate-oblong, 5 flow- 

 ered : florets free : culm oblique, compressed : root fibrous. 6 8 i. S. 

 praten"sis (O. J. 4), panicle diffuse : upper leaves much shorter than the smooth 

 sheaths : florets acute, 5 nerved, webbed at the base : stipule short truncate : 

 root creeping. 23 f. S. 



121. PODOPHYLLUM. 27. 61. 



pelta'tum (wild mandrake, may-apple. O. w. M. 4), stem terminated with 2 

 peltate palmate leaves : flower single, inserted in the fork, formed by the pe- 

 tioles of the leaves. Sometimes the plant is 3 leaved, and sometimes the 

 flower is inserted on the side of one of the petioles. 12 f. S, 



181. POGONIA. 7. 21. 



ophwgksso'ides (snake mouth arethusa. O. r. Ju. 4), root fibrous : scape 

 34* 



