MORNING-GLORY FAMILY 127 



somewhat urnsliaped to short-tubnlar, with 5 lobes imbricated in the bud, and as 

 many small scales or appendages inserted in the tube below the stamens, or none. 

 Ovary globular, 2-celled, 4-ovuled. Styles 2, in ours distinct, persistent; stigmas 

 globose, sometimes linear-elongated. Capsule 1 to 4-seeded, ours indehiscent. Em- 

 bryo devoid of cotyledons. — Species 158, all continents. (Derivation doubtful.) 



Biol. note. — The germinating seed produces a twining stem; this becomes parasitic by means 

 of suckers which penetrate the bark of the tirst available host. Lacking such a host the seedling 

 dies. In cases of membranous yet fleshy flowers the calyx may become so strongly adpressed 

 against the corolla-tube as to appear wanting in dried material. 



Capsule pointed or conical or at least thickened at summit ; scales present. 



Corolla-scales dentate ; flowers less than 1 line long ; stems very fine or capillary ; dry desert 



areas 1. C. denticulata. 



Corolla-scales deeply to moderately fringed; flowers 1 to 2 (or 3) lines long; stems usually 

 coarse, sometimes slender. 

 Scales narrow, oblong, shorter than the corolla-tube. 



Corolla-tube eylindric; calyx-lobes about i/i as long as the corolla-tube; flowers 2% 



to 3 lines long; thickets, mostly in the hills, common 2. C. suiinchtsa. 



Corolla-tube shallow-campanulate; calyx-lobes about as long as the corolla-tube; 



flowers 1 to 1% lines long; salt marshes, abundant 3. C. salina. 



Scales ovate or oblong-ovate, as long as the corolla-tube ; flowers 1 to 2 lines long ; alfalfa 

 fields. 

 Corolla-tube broadly campanulate ; calyx-lobes % to as long as the corolla-tube ; 



flowers 1 to 2 lines long 4. C. indecora. 



Corolla-tube narrow-campanulate ; calyx -lobes usually less than 14 as long as corolla- 

 tube; flowers IV2 to 2 lines long 5. C suaveoJe7is. 



Capsule depressed-globose, with a conspicuous central pit. 



Scales present; flowers usually less than 1 line long, merely enclosing the base of the con- 

 spicuous globose capsule. 



Scales large, deeply fringed ; moist places 6. C. arvensis. 



Scales small, represented by 2 dentate wings ; dry montane slopes or tlats..7. C. suksdorfii. 



Scales absent; flowers showy, usually 1% to 2 lines long (except in var.) and enclosing the 



mature capsule; dry sandy ridges 8. C. calif ornica. 



1. C. denticulata Engelm. Desert Dodder. Stems hair-like; flowers small, 

 % to 114 lines long, short-pediceled in small umbel-like clusters; corolla short- 

 eampanulate (urnshaped in fruit), its tube included in the rounded denticulate 

 lobes of the ealys; anthers oval, on very short filaments; scales narrow, reaching 

 to the base of the stamens, denticulate at the rounded tip and less so below; capsule 

 l^ointed, covered by the withered corolla, 1 or 2-seeded. 



Arid regions, 450 to 3000 feet: western Colorado Desert; Mohave Desert and 

 its bordering ranges; Inyo Co. East to Utah. ilay-July. 



Locs. — Myers Creek bridge, foot of Moimtaiu Sprs. grade, sw. Imperial Co., Jepson 11,766 ; 

 Ravenna, Los Angeles Co., K. Brandegee : Cushenburj- Sprs., San Bernardino Mts. (Zoe -1:165) ; 

 Barstow, E. Brandegee ; Needles, Jones 3862 ; Darwin, Inyo Co., Ferris 7906. 



Refs. — CuscuTA DENTICULATA Engelm., Am. Nat. 9:348 (1875), type loc. St. George, Utah, 

 Farry 205; Jepson, Man. 780 (1925) ; Yuncker, Mem. Torr. Club 18:171 (1932). 



2. C. subinclusa D. & H. Canon Dodder. Stems commonly stout ; flowers 21^ 

 to 3 lines long, sessile or .short-pediceled, at length in large dense elu.sters i/o to ly^, 

 inches thick; calyx-lobes overlapping, ovate-lanceolate, about y^ the length of the 

 corolla-tube; corolla-tube cylindrical, IV2 to 2V2 lines long; lobes of the corolla 

 ovate-lanceolate, minutely crenulate, scarcely more than V2 the length of the tube; 

 anthers oblong or oval, sessile or nearly so; scales narrow, fimbriate, opposite the 

 stamens but reaching only to the middle of the tube; styles slender, mostly longer 

 than the ovary; ovary capped by the withered corolla. 



Common on a wide range of shrubs and herbaceous plants, favoring river and 

 creek bottoms, canons and mountain meadows, sometimes invading orchards, 50 to 

 5500 feet : almost throughout California. Julj'-Sept. 



Locs. — S. Cal.: Ramona, San Diego Co., T. Brandegee (on Rhus laurina) ; Highland, San 

 Bernardino Valley, McCoy (on Citrus) ; Rubio Canon, San Gabriel Mts., Peirson 150 (on Rhus 

 laurina); Redondo Beach; Santa Ana River near Newport Beach, Booth 1316; Santa Cruz Isl. 



