HYDRANGEA FAMILY 115 



2. EDWINIA Heller. 



Sopals slightly longer than the hypanthium at maturity. 1. E. americana. 



Sepals several times longer than the hypanthium at maturitj'. 2. E. macrocalyx. 



3. FENDLERELLA Heller. l. F. utahensis. 



4. FENDLERA Engelm. & Gray. 



Hypanthium and lower surface of the leaves strigose, the upper surface hispidulous. 



1. F. tomenlella. 

 Hypantliium and leaves sparingly strigose or glabrous. 2. F. falcata. 



Family 59. GROSSULARIACEAE. Gooseberry Family. 



Leaf-blades plicate (folded like a fan) in vernation; flowers regular; style not incUned. 

 Plant armed with nodal spines and usually also bristly. 



Pedicels not jointed near the flowers; braotlets if present enclosed in the bract; 

 hypanthium-tube well developed, deeply campanulate to cylindric. 



1. Grossul.\ria. 

 Pedicels jointed below the short stipe-like base of the flower, bearing the bracelets 



just below the node; hj-panthium-tube short, saucer-shaped. 



2. LiMNOBOTRYA. 



Plant unarmed; pedicels jointed jiist under the flowers; braotlets if present borne 

 just under the node. 3. Ribes. 



Leaf-blades convolute (rolled in) in vernation; flowers slightly irregular; styles somewhat 

 declined. 4. Chrysobotry.\. 



1. GROSSULARIA (Tourn.) Mill. Gooseberries. 



Sepals wliite; filaments more than twice as long as the petals; style pubescent below. 

 Filaments and anthers glabrous; ribs of the leaves distinct to the base. 



1. G. missnuriensis. 

 Filaments and usually also the anthers hairy; ribs of the leaves united at the base 

 on the lower surface. 2. G. nivea. 



Sepals mostly green or purplish; filaments not more than twice as long as the petals. 

 Tube of the hypantliium externally glabrous; styles hairy towards the base. 

 Hj/panthium-tube cylindric, usually longer than the sepals. 3. G. setosa. 

 Hypantliium-tube campanulate or tiirbinate, not longer than the sepals. 

 Stamens equalling the petals. 



Peduncles well e.xserted from the bud-scales; hypanthium and sepals to- 

 gether 8-10 mm. long. " 4. G. irrigua. 

 Peduncles and pedicels together scarcely longer than the bud-scales: hypan- 

 thium and calyx together 5-7 mm. long. 5. G. oxyacanthoides. 

 Stamens about twice as long as the petals. 



Peduncles glabrous; bracts glabrous. 6. G. inermis. 



Pedmicles puberulent and often glandular ; bracts pubescent and glandular- 

 ciliate. 7. G. Purpusi. 



Tube of the hypanthium pubescent; styles wholly glabrous; stamens about equalling 

 the petals. 

 Length of the flowers 8 mm. or more; tube of the hypanthium cjlindric, not shorter 



than the sepals. 8. G. leptantha. 



Length of the flower 7 mm. or less; tube of the hypantliium campanulate, shorter 

 than the sepals. 9. G. velutina. 



2. LIMNOBOTRYA Rydb. Swamp Currants. 

 Leaves glabrous or nearly so; fruit black. 



Ijobes of the leaves acute, incised, the terminal one decidedly longer; basal sinus open; 

 stem usually densely bristly. 

 Nodal spines scarcely stronger than the bristles; stipitate base of the flowers 

 almost obsolete; peduncle and ovary densely glandular and the former pIso 

 finely villous. 1. L. lacustris. 



Nodal spines usually much stronger than the bristles; stipe-like base of the flowers 

 evident, 0.5-1 mm. long; peduncles and ovary sparingly glandular, but not 

 at all villous. 2. L. echinata. 



Lobes of the leaves obtusish, toothed, the terminal one scarcely longer; basal sinus 

 usually narrow; stem except in depauperate forms usually only slightly bristly; 

 stipe-Uke base of the flower about 0.5 mm. long; peduncles glandular and some- 

 times puberulent. 3. L. parvula. 

 Leaves pubescent and glandular on both sides; fruit bright red. 4. L. montigena. 



3. RIBES L. Currants. 



Hypantliium-tube rather poorly developed, saucer-shaped or open-campanulate. 

 Berry not glandular-liispid. 



Berry red, without glands; racemes drooping; bracts short-ovate. 



I. R. trisle. 

 Berry black, with sessile glands; racemes erect; bracts subulate-linear. 



Racemes 6-12-flowered; bracts 2-5 mm. long; leaves "Arm, villous-pubescent 



beneath, with a shallow or no basal sinus. 2. R. hudsonianum. 



Racemes 25-50-flowered; bracts minute, 1-2 mm. long; leaves tliin, essentially 

 glabrous, usually with a deep basal sinus. 3. R. petiolare. 



