BROOM-RAPE FAMILY 803 



mous, mostly included; filaments terete, adnatc to the tube of the corolla; 

 anthers .2-celled or rarely 1-celled. Styles wholly united; stigma capitate 

 or 2-lobed, Fruit a capsule, enclosed in the withering corolla. Seeds very 

 many, anatropous, furrowed or tubcrculate; endosperm transparent. 



Flowers subtended by bractlets. 

 Flowers without bractlets. 



1. ^^YZORIiHIZA. 



2. TlIAUiLSIA. 



1. MYZORRHIZA Philippi. Broom-rape. 



Whitish or pinkish herbs, parasitic on the roots of other plants. Leaves scale- 

 like, usually pubescent. Flowers spicate, racemose or corymbose, subtended by 

 bractlets. Calyx of 5, nearly equal, narrow lobes. Corolla 2-lipi>ed; tube more 

 or less curved; throat open; hps erect. Capsule 1-cclled, 2-valvcd. [Aphyllon 

 A. Gray, in part,] 



Flowers all manifestly pedicelled; inflorescence corymbose; anthers woolly. 



1. M. corymbosa. 



Flowers sessile or nearly so; only the lowest sometimes short-pcdiceUed ; flowers spicate 



or paniculate. , , „ „ , ^ 



Inflorescence spicate, though sometimes branched; corolla usually pxu-ple; stem not 



bulbose at the base. « , -^ w^ 



Corolla 20-25 mm. long; anthers woolly. 2. M. muUtnora, 



Corolla 15-20 mm. long; anthers glabrous. 3. M.ludoriciana. 



Inflorescence usuaUy a loose eJongated panicle; coroUa yeUow, about 12 mm. long; 

 stem bulbose at the base. 4. M. pinorum, 



1. M. corymbosa Rydb. Stem 5-10 cm. high, glandular-puberulent ; 

 scales about 1 cm. long, lance-ovate, acute; bracts hnear, about 1 cm. long; bract- 

 lets hnear-subulate; cal>oc-tube 4 mm. long; lobes lance-subulate; corolla dark 

 purple, about 2.5 cm. long; anthers woolly. Parasitic on composites, &c.: Mont. 

 — Wyo. — Ida. — B.C. SubmonL^Mont Jl, 



2. M. multiflora (Nutt.) Rydb. Stem 1-2 dm. high, glandular-puberulent; 

 scales ovate, acute, 1 cm. long; calyx-tube about 4 mm. long; lobes Unear-lance- 

 olate, attenuate, 8-10 mm. long; corolla dark purple; lobes oblong, acutish. 

 Orobanche multiflora Nutt. Aphyllon mvliiflorwn A. Gray, Parasitic on ConUea 

 and other shrubs: Tex.— s Colo.— Utah— Calif.; Mex. Son. My-Jl. 



3. M. ludoviciana fNutt.) Rydb. Stem 0.5-2 dm. high, glandular-puberu- 

 lent, sunple or branched; scales ovate, scarcely 1 cm. long; cahot-tube 3-4 mm. 

 long; lobes lanceolate, attenuate, 7-8 mm. long; corolla usually purple, rarely 

 yellow^h; upper Up often only slightly cleft; lobes oblong, acute. 0. ludonciana 

 Nutt Parasitic on Artemisia and other Composites, &c., in sandy soil: Sask.— 

 111.— Tex.— CaUf.— Wash.— B.C. Plain—SybmonL Je-Au. 



4. M. pinorum (Geyer) Rydb. Stem 2-3 dm. high, glandular- and crisp- 

 hairy; scales lanceolate, acute; calyx-tube 3 mm. long; lobes lance-subuh.t«, 4 

 mm long; coroUa-hps 3-4 mm. long, the upper 2-cIeft, the lower 3-diyided to 

 the base into lanceolate acute lobes, O. pifwrum Geyer, A, pineiorum A. Gray. 

 Parasitic on conifers: Ida.— Wash. SubmonL Je-Au. 



2. THALESIA Raf. Cancer-root, 



Pale or pmk root-parasites. Stem simple or branched. Leaves scale-like. 

 Calvx 5-cleft, with nearly equal lobes. CoroUa sUghtly bUabiate; tube more or 

 less curved; upper lip 2-lobed; lower lip 3-lobed. Stamens included. ^Stigma 

 peltate. Capsule 1-celled, 2-valved, uith 4 placentae. [Aphyllon Mitchell.] 



r^ 1^^ 1/^v.oc cnhnlatp much longcr than the tube; stem very short, 1-3-flowered. 

 ^'^S;roS?m^or piiXs cm SflLs long; tube 4-5 mm. wide at the throat :^lot^.obloiig, 



Coi^tod^p'pffl^.^ften with j-eUowish veins; lobes oval or serm-orbicidar rounded. 

 ^° Co^Cl^nim. long; tube strongly cui^-ed. 4-5 mm. wide ^yi^e l)hroat^^ 



CoroUa 20-30 mm. long; tube not so strongly curved. 5-8 mm. wide at the^tto^- 



r^.i.-.-lobes lanceolate or triangular, about equalling the tube; stem evident, several- 



•oSI p^plish, its lobes rounded or merely mucronate: sepals more or^l^^gj^" 



-olla sulphur 



5. r. lutea. 



