148 PARNASSIACE.E. (PARNASSIA FAMILY.) 



13. RIBES, L. CURRANT, GOOSEBERRY. 



Calyx tube adherent to the ovary, the limb 5-lobed. Petals 5, small. Sta- 

 mens 5. Ovary 1-celled, with 2 parietal placentas. Styles more or less united. 

 Fruit a 1 -celled many-seeded berry. Seeds anatropous, with the minute em- 

 bryo at the base of hard albumen. Spiny or unarmed shrubs, with alter- 

 nate palmately veined and lobed leaves, without stipules, and with axillary 

 racemose or clustered flowers. 



# Steins sjiiny and commonly bristly : peduncles 1 -3-Jtowered. 



1. R. Cynosbati, L. Leaves on slender petioles, slightly cordate, 

 roundish, 3 -5-lobed, pubescent; peduncles 2- 3-flowered ; stamens and single 

 style not longer than the broad and short calyx tube ; petals obovate ; berry 

 mostly pricklv. Mountains of North Carolina. July. Stem smooth or 

 bristly. Leaves l'-2' in diameter, 



2. R. rotundifolium, Michx. Leaves small, smoothish, roundish, 3 - 

 5-lobed, often acute at the base, on slender petioles ; Peduncles 1 - 2-flowered ; 

 stamens and 2-parted style longer thau the narrow-cylindrical calyx tube ; 

 petals spatulate ; berry small, smooth. Mouutaius of North Carolina. 

 Shrub 3-4 high, often unarmed. Leaves ' - 1' iu diameter. 



3. R. gracile, Michx. Axillary spine very short; leaves on slender 

 petioles, pubescent on both sides, the lobes acute, incised, and acutely toothed ; 

 peduncles long, capillary, erect, 1 -2-flowered ; calyx smooth, tubular-campan- 

 ulate. Mouutaius of Tennessee. 



* * Stems without spines or bristles : racemes many -flowered. 



4. R. prostratum, L'Herit. Leaves long-petioled, deeply cordate, with 



about 5 spreading incised and serrate lobes, smooth; racemes erect; style 2- 

 cleft ; berrv glandular-bristly. Mountains of North Carolina May -June. 

 Stems reclining. Racemes 3' -5' long. Leaves 2' -3' in diameter. 



5. R. resinosum, Pursh. Plant clothed in every part with resinous 

 glandular hairs; leaves roundish, 3 -5-lobed; racemes erect; bracts linear, 

 longer than the pedicels; calyx flattish; petals obtusely rhomboidal; fruit 

 hirsute. Mountains of North Carolina. April - May. (*) 



ORDER 51. PAKNASSIACE^}. (PARNASSIA FAMILY.) 



Perennial smooth herbs, with ovate or reniform chiefly radical and 

 entire leaves, on long petioles, and large solitary flowers terminating 

 the scape-like, 1-leaved stem. Sepals 5, persistent. Petals 5, ovate 

 or obovate, veiny, imbricated in the bud, deciduous. Fertile stamens 

 5, alternating with the petals : anthers introrse. Sterile ones in sets 

 of 3-15 more or less united filaments, placed opposite each petal. 

 Ovary 1-celled, with 3-4 parietal placentze. Stigmas 3-4, sessile, 

 placed over the placentae. Capsule loculicidally 3-4-valved at the 

 apex, many-seeded. Seeds anatropous, winged, without albumen. 

 Embryo straight, cylindrical. 



