OaOBANCHACEAE (bROOM RAPE FAMILY) 463 



and sometimes with few or no leaves or bladders. ' Bladders furnished with a 

 valvular lid and usually with a few bristles a.t the orifice. Lips of the im- 

 parted calyx entire, or nearly so. , , i i " ;; . '■ 



Leaves pino^te^ divided; cprolla broad (13 mn^.), with permanfint spur ^ . ,,,1. U. yulga^s. 

 Leaves aiohoto'mously divided; corolla Half as broad. ' . ' . , , . 2. U. niiijoi". 



1. Utricutoia vulgai^is' L. Sp; PI. 18. 1753.!' Stems submersed, leafy, 

 3^12 dm. long: leaves niimeroiis, ; alternate; blades 2-3-pinnately dissected 

 into filiform ' segments, usually bearing nvmierous bladders;' bladders when 

 fully developed 3-5 mm. long:, scapes erect, 1^ din. ihigb: racemes 5-10- 

 flowered; pedicels 6-15 mm. long, recurving at maturity: calyx becoming 

 3-3.5 mm. lon^: corolla yellow, 12-15 mm. broad; the upper lip erect, nearly 

 enttfe'; the lower lip spreading, slightly 3-lobed; spur not'appi;essed, hprn-| 

 like, slightly curved, shorter than the lower lip': capsules many-seeded. — In 

 brboks and ponds throughbut mo^t of the nortfierhi hemisphere, ijiaa! : il i 



2. Utriculiariaminor L. 1. c. Scapes slender; 0.5-1.8 dm. high; branches 

 floating, short: leaf-divisions fewiand setaceous; -bladders i borne along the 

 leavesv'few, often none, the largest not over 2 mm. long: flowers 1-10, pale 

 yellow; racemose: corolla 4^6 mm. broad, ringent, the upper lip smaller than 

 the lower: spur usually reduced to a blunt, broad protuberance, shorter than 

 the lips: pedicels reflexed in fruit.-r:^halloW jScind"^ andtbogs;:likethe pi'eced- 

 ing widely ddstributedi i!i ■■■ ,■!!,. i ii-i-frt .i. 



106. OROBANCHACEAE Lihdl. Broom Rape Family 



Commonly perennial herbs, destitute of green foliage and parasitic on the 

 roots of other plants. Stems sometimes almppt wanting. ,., Le^yes, scale-like. 

 Flowers perfect, or rarely dioecious. Calyx of 4 or 5 more or less united se- 

 pals, persistent; tube, campanulate or itubulatr.,, Corojla persistent, on wither- 

 ing;, limb more or less bilabiate and irregular. ,,StapQens 4, i didynampjis, 

 adn^te tp !th^ corolla, mostly included; anthers 2-celled or rarely Impelled, 

 leathery. Styles united, terminal; stig?na papitate or 2-lpbed; ovules mostly 

 numerovis,; anatropous. Fruit a capsule, : inclosed in the; persi^ljent corolla, 

 with 1 or apparently 2 cavities. , i , , ,,, ., ;. ( i ,! .., , ,,,:,vi 



Flowers spicate, sessile or subsessile, bracteate .1. Orobanche. 



Flowers pedunculate and braCtJes^., ri '.f .: A iViV '. ^i ,^ . i . '. . 2. Thalesia. 



1. OROBANCHE L. Beoom Rai'e ' 



Parasitic herbs, on roots of. yariolls' plants, commonly with' yellowish ox 

 brownish pubescent foliage. Leaves sijile-lik^, PlpwerS spicate, with bract- 

 lets. Calyx with a deep sinus above dnd below, the lateral lobes often 2-cleft.' 

 Corolla irregular;' tube slightly, cur'ved;'l;iHib, 2-lipped, the uppei- lip erect oi- 

 incurved, the lower lip spreading. Ovary 1-celled. ' Capsule 2-valved.- — Aphyl- 

 lon in part. 



Corolla 2 cm. or more long; anthers woolly ', y ' , ' i. ! ; : ; 1. D. multiflbra. 

 Corolla less than 2 cm. long; anthers glabrous 2. O. ludoviciana. 



1. Orobanche iaultiflora Niltt. PL' Gamb. 179. 1847. Whole plant viscidly 

 prainose-puberulent, 1-3 dm. high: flowers nearly sessile or the lower ones 

 sbort-pediceled:. caljrx bibracteolate, almost 5-parted into linear-lanceolate 

 lobes, fully half the length of the ample purplish corolla: anthers very woolly. 

 — Gravelly plains and pine woods; western Texas' to Arizona, extending into 

 Southern Colorado. 



2. Orobanche ludoviciana Nutt. Gen. 2: 58. 1818, Rather less pubescent: 

 spikes more frequently compound: calyx less 'deeply iand somewhat unequally 

 5-cleft: corolla about half smaller; upper lip sometimes almost entire: anthers 



