Ill 



XXXI. EOSACE^. 



This order nearly coincides with the class Icosandria of Linnseas. The Petals or Stamens 

 rise from a disc or tiihe connected with the calyx, and considered hy Liiina;us and others as 

 forming part of it. The odd Lobe of the Calyx is at the top. The Stamens are some midtiple of 

 the Petals, or indefinite and numerous. Germens 1 or more, each with its style. L. alternate. 



The Tribes are :— 



1. AMYGDALE^. — Fruit a solitary drupe. Seeds 1 or 2, pendulous. Calyx 



deciduous Gen. 203, 204. 



2. SPIRiE^.— Pruit of several follicles. Seeds 1-6, suspended from the 



edges of the foUicles. Calyx persistent ...... Gen. 205. 



3. DRYADEjE. — Pruit of several di-y or ileshy acini. Calyx persistent. 



Tube open Gen. 206-215. 



4. SANGUISORBE^.— Pruit of several dry, indehiscent carpels. Attach- 



ment of Seed near to that of style. Calyx persistent. Tube contracted 



at top, embracing the seed ........ G«n. 216, 217. 



5. ROSEiE.— Disc of Calyx contracted into a fleshy tube containing the seeds Gen. 218. 



6. POME^.— Pi-uit a Pome of 1-4-6 eeUs Gen. 219-225. 



Tribe I. JMYGDALEM 

 203. AMYGDALUS. 



1. communis. L. lanceolate. Stalk at 

 least equal in length to half the width of L. 

 Serratm-es glandular. Tube of Cal. campanu- 

 late. Nut deeply pitted. s.T. 3, 4. Calc. 

 rocks on shore. Sic. 



2. nanus. L. lanceolate, on a short stalk. 

 Serratures without glands. Tube of Cal. cy- 

 lindrical. Nut nearly smooth. s.T. 4. Rocks. 

 Vienna, on the Danube. 



3. Persica. L. lanceolate, on a very short 

 stalk. Drupe not bursting. Nut deeply 

 wi-inkled and pitted. s.T. 3, 4. Cult, m ojjen 



fields, s. Europe. 



204. PRUNUS. 



iL. Truit downy. Nut obtuse at one end. 

 Young L. convolute. 



1. Armeniaca. PL sessile, solitary or in 

 pairs, before L. L. somewhat cordate. s.T. 

 3, 4. Cult, in open fields, s. Em-ope. 



2. brigantiaca. PI. nearly sessile, crowded, 

 coetaneous with L. L. somewhat cordate, 

 acuminate. S. 4. Brian9on. Culz near Suza. 



B. Fruit hairless, bloomy. Nut acute at 

 both ends. Young L. convolute. 



3. spinosa. Pr.-stalk generally solitary 

 (smooth; young branches pubescent, Koch). 

 L. elliptic or lanceolate. Branches thorny. PL 

 before the L. Pi-uit globose. S. 4, 5. Hedges 



and thickets. — Boreau, Tl. dtt Centre, has 

 two varieties of this : 0. macrocarpa, with an 

 ovoid Fr., much larger than in a. ; and y. se- 

 rotina, with Fl. after L. He has also a P. 

 fruticans, with Fr. -stalks in pairs, and Fr. as 

 large as a small cherry. 



4. insititia. Pr.-stalks usually in parrs 

 (downy; young branches velvety, Koch). L. 

 ovato-lanceolate. Branches ending in a spine. 

 PI. before the L. Pr. globose. l.S. 5. Woods 

 and hedges. 



5. domestica. Pr.-stalks solitary or in 

 pairs (downy; young branches smooth, Koch). 

 L. ovato-lanceolate. No thorns. PI. somewhat 

 before L. Pr. oval. s.T. 5. Woods and 

 hedges. 



6. cerasifera. Pi-.-stalks soKtary (smooth ; 

 young branches smooth, Koch). L. eUiptic. 

 Pr. red, globose, pendulous. T. 4, 5. Cult, 

 iti Ger. and Pr. 



7. Cocumilia. Everywhere hairless. Pr.- 

 stalks in paii's. L. obovate, acuminate at each 

 end, with glandular crenatm-es. Pr. yellow, 

 ovato-oblong, acute, the point somewhat re- 

 curved. s.S. 4. Woods. Calabria. 



8. prostrata. " Stem much branched, 

 procumbent. L. ovato-eUiptic, serrulate, to- 

 mentose beneath. PI. usually in pairs. Stalks 

 veiy short. Tube of Cal. cylindrical. Drupe 

 ovoideo-lenticular, hairy on the suture-like 

 margin. s.S. 5. High. Monte Ohena, Sard." 

 Beet. 



9. humilis. " Stem much branched, pro- 



