KEY TO THE FAMILIES AND GENERA 



109 



113. DIAPENSIACEiE. 



A. Corolla persistent; ataminodes 0. 



B. FI3. sessile 1. Pyxidan- 



[thera. 



BB. FIs. pedunculate 2. Diapensia. 



AA. Corolla deciduous; staminodes 5. 



B. Stuniinodes small, scale-like, separate; 



corolla-lobes crenate 3. Shortia. 



BB. Staminodes long, linear, separate; corolla- 

 lobes fimbriate 4, Schizocodon. 



BBB. Staminodes spatulate, connate with sta- 

 mens; corolla-segms. entire 5. Galax. 



114. PLUMBAGINACE^. 



A. Calyx -limb usually spreading, scarious and 

 colored. 

 B. Lvs. usually needle-like: styles distinct at 



angles of ovary; stigmas sub-capitate. ... 1. AcantkoU- 

 BB. Lvs. tlat: styles as above; stigmas capitate, [mon. 



oblong or linear; infl. cymose or dense or 



scape 1- to few-fld 2. Statice. 



BBB. Lvs. flat or linear-subulate: styles shortly 

 subconnate at vertex of ovary; stigmas 



linear; scape 1-headed 3. Armeria. 



AA. Calyx-lobes or teeth erect with merely scarious 

 sinuses. 



B. Stamens free; calyx glandular 4. Plumbago. 



BB. Stamens adnate to middle of corolla; calyx 



not glandular 5. Cerato- 



[stigma. 



115. PRIMULACE^. 



A. CoroUa-lobes imbricated in quincunx fashion. 

 B. Plants aquatic: ovules anatrophous; um- 

 bilicus basal 1. Hottonia. 



BB. Plants terrestrial: ovules semi-anatropous; 

 umbilicus ventral. 



c. Caps, dehisces by a lid at top 2. Soldanella. 



CC. Caps, dehisces by valves. 



D. The corolla-lobes bent back 3. Dodecatkeon. 



DD. The corolla-lobes spreading or ascend- 

 ing. 

 E. Stamens affixed to base of corolla; 



anthers long-acuminate 4. Cortusa. 



£E. Stamens affixed to corolla-tube; an- 

 thers obtuse. 

 F. Corolla-tube usually longer than 

 calyx. 



o. Caps, many-seeded 5. Primula. 



GG. Caps. 1-2-seeded 6. Douglasia. 



FF. Corolla-tube as long as calyx or 

 shorter : caps, few or many- 

 seeded 7. Androsace. 



AA. Corolla-lobes convolute in the bud: ovules 

 semi-anatropous; umbiUcua ventral. 



B. Caps. circuniscis.sile 8. Anagallis. 



BB. Caps. longitudinally dehiscent by valves. 



c. Lobes of corolla bent back 9. Cyclamen. 



CC. Lobes of corolla not bent back. 



D. Corolla-lobes 5-6: testa of seed with a 

 firm epidermis. 



E. Staminodes 10. Lysimacliia. 



EE. Staminodes 5, each corolla -lobe 



curved around its stamen 11. Steironema. 



EEE. Staminodes 5, tooth-like; corolla- 

 lobes not encircling stamens 12. Naumbergia. 



DD. Corolla-lobes usually 7: testa of seed 



with a lax epidermis 13. Trientalis. 



The genus Glaux may be met with occasionally in cultivation. 



116. MYRSINACEiE. 



A. Staminodes 5; corolla gamopetalous. 

 B. Corolla cyUndrical, shortly 3-lobed: fr. many- 

 seeded 1. Theophrasta, 



BB. Corolla subrotate, deeply 5-parted: fr. 1- 



to many-seeded 2. Clavija. 



BBB. Corolla rotate-campanulate, deeply S-cut: 



f r. few-seeded 3. Jacquinia. 



AA. Staminodes 0; corolla gamopetalous or poly- 

 petalous: fr. l-seeded. 

 B. Corolla imbricated; fla. fascicled, lateral or 



axillary 4. Myraine. 



BB. Corolla convolute; panicles terminal or 



terminal and axillary 5. Ardisia. 



The genus Maisa is also accounted for. 



117. SYMPLOCACEiE. 

 The only genus Symplocos. 



118. STYRACACEiE. 



.\. Fr. superior, globular or ovoid, not ribbed nor 



winged 1. Styrax. 



w. Fr. inferior, elongated ribbed, or winged. 



B. Infl. panicled, many-fld., drooping, sub- 

 terminal 2. Pierrnslyrax. 



BE, Infl. of few-fld. fascicles, often lateral 3. Halesia. 



119, SAPOTACE.S. 



A. Corolla-lobes, calyx -segms., stamens and 

 staminodes (when present) isomerous. 

 B. Staminodes 0: seeds usually albuminous: 



fls. 5-merous, rarely 6-7-merous 1 Chryaophyl- 



BB. Staminodes small, usually affixed higher \lum. 



than stamens, sometimes few or 0: seeds 



not albuminous: fls. 4-5-merouM 2. Lucuma. 



BBB. Staminodes alternate with stamens, rarely 



affixed higher; seeds albuminous 3. Sideroxylon. 



A A. Corolla-lobes and calyx-segms. isomerous: 



stamens twice as many or more 4. Isonandra. 



AAA. Corolla-lobes usually 2 or 3 times as many as 

 calyx-segms. 



B. Calyx-segms. 1 series 5. Bumelia. 



BB. Calyx-segms. 2 series 6. Mimusop& 



The genus Pouteria is now deacribvxi in this family. 



120. EBENACE.^;. 



A. The fls. usually hermaphrodite; stamens in 1 



series 1. Royena. 



AA. The fls. dioecious. 



B. Fls. usually 3-merous; stamens 3-co, com- 

 monly 9; ovary 3- or 6-celled 2. Maba, 



BB. Fls. usually 4-5-merou3; stamens 4-8, usu- 

 ally in 2 series; ovary 4- or 8-celled 3. Diospyros, 



121. OLEACEiE. 



Fr. didymous or septicidally divisible into 



two: corolla-lobes strongly imbricate: 



ovules laterally affixed near base; seeds 



erect, without endosperm; radicle 



inferior 1. Jasmine Tribe. 



Fr. terete or compressed parallel to the 



septum, locuUcidally dehiscent; ovules 



pendulous from apex of cells ; seeds 



winged, pendulous: radicle superior. ... 2. Lilac Tribe. 

 Fr. entire, dry, indehiscent, winged, a 



samara, compressed contrary to the 



septum; ovules twin, pendulous from 



apex of cell; seeds pendulous with en- 

 dosperm; radicle superior 3. Ash Tribe. 



Fr. fleshy and indeliiscent, a drupe or 



rarely a berry, not lobed; ovules twin, 



laterally affixed near the apex; seeds 



solitary, suspended or pendulous, with 



endosperm; radicle superior 4. Olive Tribe. 



1. Jasmine Tribe. 



Fr. fleshy, indehiscent, didymous or by abortion 



simple 1. Jasminum. 



2. Lilac Tribe. 



A. Corolla-lobes imbricate. 

 b. Ovules 3-4 in a cell: lvs. pinnate and fls. 



white: corolla-lobes shorter than tube 2. Natkuaia, 



BB. Ovules 4-10 in a cell: lvs. entire or 3-foho- 

 late and fls. yellow: lobes many times 



longer than tube 3. Forsythia. 



AA. Corolla-lobes induplicate-valvate; tube long 



or short: ovules 2 in a cell; seeds albuminous. 4. Syringa. 



3. Ash Tribe. 



A. Lvs. usually pinnate: fr. elongate, with a 

 terminal wing, generally l-seeded by abor- 

 tion 5. Fraxinus. 



AA. Lvs. undivided: fr. ovate or orbiculate, sur- 

 rounded by a wing, usually 2-ceIled and 2- 

 seeded 6- Fontanesia. 



4. Olive Tribe. 



A. Corolla of nearly distinct petals which are long 



and linear 7. Chionan- 



A.A. Corolla-lobes imbricate, broad and obtuse. \thu8, 



B. Endocarp of drupe thinly cnistareous 8. Phitlyrea. 



BB. Endocarp of drupe hard and somewhat 



woody 9. Oamanthua. 



AAA. Corolla-lobea induplicate-valvate. 



