MONOECIA. POXYANDRIA. 2t3 



sionally, or in a few species, allDgether entire; flowers 

 verticiilated by 3's, the upper ones masculine, the lower 

 fewer ar.d feminine. Sap lactescent ? 



Species. 1. S. sagittifolia- Q. latifolia. 2. obtusa. Mas- 

 culine scape branched at the ^ase. Sap lactescent, hard- 

 ening- into a white and hyaline g-um. 3. hasiata, Ph. /S. 

 gi^acilis. ,S. g-racilis, Fh. 4). pubescens. Muhl. Catal. v. s. 

 In Herb. Muhl. The whole plant is pubescent; but still 

 apparently nothing more than a variety oi sagittifolia. 5. 

 heterophylla. 6. lancifulia. S. fakuta, Pb. 2^\d ^. falcata^ 

 Persoon, 2. p. 563. 7- rig-ida, Ph. 8. grajninea, Mich. 

 S. simplex? Ph. 9. acniifolia, Pk. Leaves acutely subu- 

 late, rigid, rarely natant; scape simple, loMger than the 

 leaves; flowers monoicous,, all pedunculate, female ones 

 3, stamina 12 to 15. 6'. acutifolia?. Lin. suppl. p. 419. (AU 

 so indigenous to Surinam.) Hab. K.xtremely abundant 

 on the sliores of the Delaware, below tide water mark. 



10- * pusilla. Leaves linear, obtuse and short, the sum- 

 mits foliaceous; scape simple, shorter than the leaves; 

 flowers monoicous, few; female flower solitary, deflected; 

 stamina mostly 7- Hab. With the above, in the vicinity 

 of Philadelphia. Misma subulata^Vn. Probably not of Lin- 

 naeus, whose synonymn accords better with S. acutifoHa, 

 of Pursh. Oes. The whole plant only 1 to 3 inches high; 

 leaves rarely ever subulate, scarcely a line wide, and ob^ 

 tuse; male flowers 3 to 6; female 1, recurved. Flower- 

 ing in July and August. 11. nutans. 



Of this genus there are 2 other species, one of them 

 in India, the other indigenous to the al])ine lakes of Dau= 

 ria and scarcely distinct from 5- natans. S. sagittifolia is 

 also common to Europe, 



51. QUERCUS. Z. (Oak.) 



Masc. Calix mostly 5-cleft. Corolla none- 

 Stamina 5 to 10. Fem. Caliv 1 -leaved, entire, 

 scabrous. . Corolla none. Styles 2 to 5. JWit 

 (or gland) coriaceous, mostly surrounded at the 

 base by the persistent calix. 



Trees or rarely shrubs; leaves deciduous or sempervi» 

 rent, entire or sinuately lobed; aments axillary, pendu- 

 lous, flowers distinct. — (In Q. Suber, tl;e bark is thick and 

 fungous, constituting the cork of commerce; the bark of 

 Q. tinctoria is the Quercitron so well known as & niaterial 

 for dyeing yellow; and t,he Galls produced by the punc-* 



