MONOECIA MONADELPHIA. 1^7 



385. CASTANEA. Sterile Fl. in a long, naked cylindrical ament; 

 cat. 1-leaved, 6-cleft; stam. 1012. Fertile Fl. 3. Involucrum 4- 

 lobed, thickly muricate ; cal. 5 6 lobed ; styles G ; nut mostly ] - 

 seeded, invested with the enlarged involucrum. 



386. BETULA. Sterile Fl. in a cylindrical ament ; scales peltate, 3-flow- 

 ered; cal. 0; cor. 0; stam. 1012. Fertile Fl. Scales of the ament 

 3-flowered ; cal. 0; cor. ; styles 2; nuts compressed, with a broad - 

 winged margin, 1 -seeded. 



387. CARPINUS. Sterile Fl. in a cylindrical ament; scales ciliate; 

 stam. about 10. Fertile Fl. in a loose ament ; scales large, 3-lobed, 

 1 2 flowered ; cal. 3-cleft ; styles 2 ; nut ovate, sulcate, 1-seeded. 



388. OSTRYA. Sterile Fl. in a cylindrical ament ; scales 1-flowered ; 

 cal. ; filaments branched. Fertile Fl. Ament naked ; cal. ; cor. 

 : caps, inflated, imbricate, 1-seeded at the base. 



389. PLATANUS. Flowers in globose aments. Sterile. Cal. 0; 

 cor. minute; anth. adnate to the filaments from the base. Fertile. 

 Cal. many-parted ; cor. ; stig. recurved ; caps, subclavate, 1- seed- 

 ed, mucronate with the persistent style; base surrounded with a 

 hairy pappus. 



390. LIQJJIDAMBAR. Sterile Fl. in a conic ament, surrounded with 

 a 4-leaved involucium ; cal. and cor. ; Jilam. numerous. Sterile 

 Fl. Ament globose, surrounded with a 4-leaved involucrum ; cal. 

 1-leaved, urceolate, 2-flowered ; styles 2 ; caps. 2, surrounded by the 

 base of the calyx, 1 -celled, many-seeded. 



391. JUGLANS. Sterile Fl. Ament imbricate; the scales mostly 5- 

 parted ; cal. about 5-parted ; stam. 2030. Fertile Fl. Cal. 4-cleft, 

 superior ; cor. 4-parted ; styles 1 2 ; drupe partly spongy ; nut 

 rugose and irregularly furrowed. 



J92. GARY A. Sterile Fl. Amc.nl imbricate; scales 3-parted ; cal. and 

 cor. ; stam. 4 6. Fertile Fl. Cal. 4-cleft, superior ; cor. ; styles 

 ; sf.ig. subdiscoid, 4-lobed ; pericarp 4-valved ; nut subquadrangu- 

 lar, even. 



393. ARUM. Spaihe 1-leaved, cucullate ; cal. and cor. ; spadix naked 

 above, bearing sessile anthers below the middle, and germens at th 

 base; berry 1 -celled, many-seeded. 



J94. LECONTIA. S-pathe convolute ; calyx and cor. ; spadix cov 

 ered with flowers, fertile at the base, sterile above ; berry 1-seeded. 



395. CALLA. Spaihe ovate, somewhat flattened ; spadix covered with 

 flowers ; barren and fertile intermixed ; calyx and cor. ; berry 

 many-seeded. 



MONADELPHIA. 



396. PINUS. Sterile PI. Scales peltate ; cal. and cor. ; anthers 2, 

 sessile, 1-celled. Fertile Fl. in an ovate or conical strobile ; scales 

 closely imbricate, 2-flowered ; cor. ; nut winged, covered by the 

 scales of the cones. 



397. CUPRESSUS. Sterile Fl. in an ovate ament; scales peltate; 

 cal. and cor. ; anth. 4, sessile. Fertile Fl. Strobile with the scales 

 peltate ; cal. and cor. ; germens 4 8 under each of the strobile ; 

 nuts ano-ular, compressed. 



398. ACALYPHA. Sterile Fl. Cal. 3 4-parred ; cor. ; stam. 8 

 16. Fertile Fl. Cal. 3-leaved ; cor. ; styles 3 ; caps. 3-celled ; seed 

 \ in each cell 



37* 



