HYDROLEACEAE 969 



mainly near the top with ratlier coarse processes : capsules ovoid or globose-ovoid, 5-7 ram. 

 long, 2-beaked. 



On herbs and shrubs, Maryland to Georgia Summer and fall. 



11. Cuscuta Gronovii Willd. Foliage yellowish, becoming orange. Stems slender, 

 often high-climbing, sometimes matted : Howers short-pedicelled, usually numerous in 

 dense clusters : calyx not subtended by bracts ; lobes 5, ovate, obtuse, much shorter than 

 the corolla-tube : corolla about 3 mm. long ; lobes 5, ovate, obtuse, spreading, somewhat 

 shorter than the tube ; scales narrow, equalling the corolla-tube, or surpassing it, broader 

 above than below, sparingly fringed near the top and more sparingly along the sides with 

 stoutish irregular processes : capsules subglobose, 3 mm. in diameter, sometimes abruptly 

 pointed, partially enclosed by or seated in the persistent corolla. 



On herbs and low shrubs, Xova Scotia to Manitoba, south to Florida and Texas. Summer and fall. 



12. Cuscuta calyptrata Engelm. Foliage pale, turning yellowish at maturity. 

 Stems branching ; branches slender, not matted : Howers few or rather numerous in small 

 clustered cymes, these becoming dense at maturity, sessile or nearly so : calyx glabrous ; 

 lobes orbicular-ovate or deltoid-ovate, obtuse, often slightly eroded : corolla early exserted; 

 lobes ovate, obtuse, spreading or reflexed at maturity ; scales densely fringed, especially at 

 the top, with rather long regular processes, narrower above than below : capsules sub- 

 globose, 4-4.5 mm. in diameter, each capped with the persistent corolla. 



On herbs and shrubs, New York to Florida and Texas. Summer and fall. 



13. Cuscuta glandulosa (Engelm.) Small. Foliage bright orange, that of the 

 inflorescence with red sliining glands. Stems widely branched and spreading, commonly 

 matted : Howers short-pedicelled, in loose subglobose clusters : calyx glandular ; lobes 5, 

 ovate to orbicular-ovate, obtuse : corolla 2-2.5 mm. long, pale ; tube barely exserted ; 

 lobes o, spi-eading, obtuse ; scales as broad as long, sometimes surpassing the corolla-tube, 

 fringed all around with quite regular processes : capsules spheroidal, 3-3.5 mm. in 

 diameter. [C. obtusifolia var. glandulosa Engelm.] 



On species of Polygonum aud other herbs, Georgia to Florida and Texas. Also in the West Indies. 



14. Cuscuta exaltata Engelm. Foliage yellowish, deeper at maturity. Stem nmch 

 In'anched ; brandies cord-like, high-twining, 2-6 m. long, often twisted together : flowers 

 short-pedicelled, rather crowded in short spike-like racemes or panicles : calyx sub- 

 globose, becoming flattened ; lobes suborbicular, fully as long as the corolla-tube : corolla 

 about 4 mm. long ; lobes 5, suborbicular, about k as long as the tube, erect or ascending ; 

 scales much shorter than the corolla-tube, 2-cleft, dentate : styles united : capsules globose- 

 ovoid, 4-5 mm. high, obtuse. 



On shrubs and trees, southern Texas. Spring to fall. 



Family 4. HYDROLEACEAE H.B.K. Water-leaf Family. 



Annual or perennial caulescent herbs, with a watery sap. Leaves alternate, 

 or sometimes opposite near the base of the stem, without stipules : blades lobed 

 or pinuatifid, or rarely entire. Liflorescence cymose or in one-sided racemes, 

 more or less clustered. Flowers perfect. Calyx of 5 more or less united sepals, 

 free, the sinuses often appendaged. Corolla regular : lobes 5, convolute or im- 

 Imcated in aestivation, often appendaged inside. Androecium of 5 stamens adnate 

 to the base of the corolla and alternate with the lobes. Filaments distinct, often 

 bearded. Anthers introrse, versatile. Gynoecium compound. Ovary free, 

 1-celled, or rarely 2-celled, with parietal placentae. Styles partly united. Stigma 

 somewhat capitate. Ovules few or numerous. Fruit a capsule with one or two 

 incomplete cavities. Seeds few or sometimes numerous, amphitropous, with a 

 crustaceous testa. Endosperm cartilaginous. Embryo eccentric. [^Hydrophylla- 

 ceae Lindl.] 



Ovary 1-celled : styles 2-cleft : leaf-blades usually toothed, lobed or dissected. 

 Corolla-lobes convolute in the bud : placentae dilated. 



Stamens exserted. 1. Hydrophylu'm. 



Stamens included. 



Calyx not mucn enlarged at maturity, the sinuses appendaged. 2. Nemophil.\. 



Calyx much enlarged at maturity, tlie sinuses not appendaged. 3. Machocalyx. 



Corolla-lobes imbricated in the bud : placentae narrow. 4. Phacelia. 



Ovary 2-celled, but imperfectly so in Marilatmidium : styles 2, distinct : leaf-blades 

 entire. 

 Corolla funnelform or salverform : capsule loculicidal : valves bearing the 



seeds. 5. Marii.aumdutm. 



Corolla rotate to campanulate : capsule septicidal ; axis bearing the seeds. 6. Naj[.\. 



