524- 



ROSACE/E. I. DRYAS. 



(f. 69. a.), valvate in aestivation, the outer lobes accessory (f. 70. 

 b.}, and alternating rvilh the inner lobes. Petals 4-5, rarely more 

 (f. 69. b. f. 70. c.). Carpels numerous (f. 70. d.~), free, in- 

 serted in a dry or fleshy polyphore, dry (f. 70. rf.) or baccate (f. 

 71. rf.), 1-seeded. Herbs or shrubs, usually with compound leaves, 

 with 2 stipulas adnate to the sides of the petiole. 



1 DRY'AS. Calyx 8-9 -parted (f. 69. a.)- Petals 8-9 (f. 69. 

 b.). Stamens numerous (f. 69. c.). Carpels dry, numerous, 

 ending each in the feathery style (f. 69. e.). Seed ascending. 



2 GE'UM. Calyx 10-cleft, the 5 outer segments accessory. 

 Petals 5. Stamens numerous. Carpels numerous, dry, ending 

 each in a kneed style. 



3 SIEVE'RSIA. All as in Geum, but differs in the carpels end- 

 ing in a feathery (f. 70. d.) jointless style or awn. 



4 COLU'RIA. Calyx 10-parted, the 5 outer lobes accessory. 

 Petals 5. Stamens numerous. Carpels numerous, scrobiculate, 

 tailless. 



5 COWA'NIA. Calyx 5-cleft. Petals 5. Stamens numerous. 

 Carpels awned by the feathery styles. 



6 WALDSTEI'NIA. Tube of calyx turbinate, crowned by a 

 crenulated ring under the stamens, bearing bracteas on the out- 

 side. Petals 5. Stamens numerous. Carpels 2-4, globose, 

 naked at the apex, coriaceous. Seed erect. 



7 COMAROPSIS. Calyx 5-cleft. Petals 5. Stamens nume- 

 rous. Carpels few, dry, ending in filiform styles. Seeds erect. 



8 RU'BUS. Calyx 5-cleft. Petals 5. Stamens numerous. 

 Carpels fleshy, inserted on an elevated torus. Seed inverted. 



9 DALIBA'RDA. Calyx 5-6-cleft ; lobes toothed. Petals 5. 

 Stamens numerous, deciduous. Carpels 5-10, ending in short 

 styles, subdrupaceous. Seed pendulous. 



10 FRAGA'RIA. Calyx 10-cleft (f. 71. a.) the outer segments 

 accessory (f. 71. c.). Petals 5 (f. 71. i.). Stamens numerous. 

 Carpels dry, seated on an elevated fleshy torus (f. 71. d.). 

 Styles lateral. Seed pendulous (f. 71. d.). 



11 DUCHE'SNEA. Calyx 10-parted, the outer segments acces- 

 sory, foliaceous, and tridentate. Petals 5. Stamens numerous. 

 Carpels numerous, seated on a fleshy, succulent, elevated torus. 



12 POTENTI'LLA. Calyx 10-cleft (f. 72. .), the outer seg- 

 ments accessory. Petals 5 (f. 71. d. f. 72. i.). Stamens nu- 

 merous. Carpels numerous, dry (f. 72. c.), seated on an 

 elevated torus. Styles lateral. 



13 TORMENTI'LLA. Calyx 8-parted, the 4 outer segments 

 accessory. Petals 4. Stamens 1C. Akenia dry, naked, nu- 

 merous, wrinkled, seated on a depressed receptacle. Styles 

 lateral. 



14 CO'MARUM. Calyx 10-parted, the 5 outer segments acces- 

 sory. Petals 5, small. Stamens numerous. Akenia numerous, 

 seated on an elevated spongy receptacle. 



15 HORHE'LIA. Calyx 10-cleft, the outer segments acces- 

 sory. Petals 5. Stamens 10. Akenia inserted on a conical 

 receptacle, inclosed in the calyx. 



16 SIBBA'LDIA. All as in Potentilla, but the petals are very 

 minute, and the carpels and stamens are usually 5. Seed in- 

 verted. Polyphore dry. 



17 CHAMJERHODOS. Calyx campanulate, 5-cleft. Petals 5, 



obovate. Stamens 5. Styles lateral, 10, rarely 5. Carpels 5- 

 10 or more, seated on a villous receptacle. Plants beset with 

 glandular hairs. 



18 AGRIMONIA. Calyx turbinate, 5-cleft (f. 73. a. d.), invo- 

 lucrated by bristles (f. 73.). Petals 5. Stamens 15. Carpels 

 2j with terminal styles. Seed pendulous. 



19 AREMONIA. Calyx 5-cleft, surrounded by a 10-12-cleft 

 involucrum. Petals 5. Stamens 5-10. Carpels 2, with ter- 

 minal styles. Seed pendulous. 



20 BRAYE'RA. Calyx double, both 5-cleft; lobes of the 

 outer large and oblong, of the inner spatulate and shorter. 

 Petals 5, small, linear. Stamens 15-20. Carpels 2, ending in 

 exserted styles. Seed pendulous. 



TRIBE II. 



NEURA'DE.E. Calyx 5-cleft (f. 76. b.), with a short tube ad- 

 hering to the ovary, valvate in aestivation. Petals 5. Carpels 10. 

 connected into a \Q-celled capsule (f. 76. c.), which is depressed 

 at the apex. Seed bony, obliquely pendulous. A decumbent suf- 

 fruticose herb. 



21 NEURA'DA. Petals 5, inserted in the base of the calycine 

 lobes (f. 76. a.). Stamens 10. Styles 10. 



TRIBE III. 



ROSE^E. Tube of calyx contracted at the mouth (f. 76. a. e.*), 

 with a 5-parted limb (f. 76. d. f. 75. 6.) ; lobes somewhat spirally 

 imbricated in aestivation, usually pinnatiftd (f. 75. b. f. 76. (/.). 

 Petals 5 (f. 75. e. f. 76. e.}. Stamens numerous. Carpels numer- 

 ous, inserted inside the tube of the calyx, which at length becomes 

 baccate and incloses them (f. 75. f. f. 76. a.). Seeds inverted. 

 Shrubs, with impari-pinnate leaves, serrated leaflets, and with 

 the stipulas adnate to the petiole. 



22 ROSA. Character the same as that of the tribe. 



Tribe I. 



DRYA V DE./E (plants agreeing in important characters with 

 Dryas). Vent. tabl. 3. p. 349. Fragariiiceae, Rich, in Nestl. 

 pot. p. 14. Calyx 10-cleft, rarely 8-cleft or many parted, val- 

 vate in aestivation, the outer segments accessory, and alter- 

 nating with the inner ones. Petals 4-5, rarely more, alter- 

 nating with the inner segments of the calyx. Stamens numerous, 

 rarely few, inserted in the apex of the calycine tube. Carpels or 

 akenia numerous, rarely few, crowded, inserted in the torus, 

 distinct from each other, and free from the calyx, bearing the 

 styles at the side near the apex. Styles with a furrow on the 

 inside, and expanded into an oblique stigma at the apex. Akenia 

 1-ovulate, free from each other, dry or baccate. Seeds solitary, 

 erect or inverted, exalbuminous. Embryo erect, with flatfish co- 

 tyledons. Herbs or subshrubs, with usually compound bistipu- 

 late leaves, the stipulas adnate to the sides of the petioles. 



I. DRY'AS (so named by Linnaeus from the dryades or 

 nymphs of the oaks, in consequence of the leaves bearing some 

 resemblance to those of the oak). Lin. gen. no. 637. Lam. ill. 

 t. 443. Nestl. pot. 1C. D. C. prod. 2. p. 549. 



LIN. SYST. Icosandria, Polygynia. Calyx 8-9-parted (f. 69. 

 a.), with a somewhat concave tube (f. 79. a.}. Petals 8-9 (f. 

 69. b.~). Stamens numerous. Carpels numerous, each terrain- 



