320 OROBANCHACEAE. 



I. MYZORRHIZA Philippi. Broom-rape. 



Corolla 20-25 mm. long: anthers woolly. i. A/. mulliHora. 



Corolla 15-18 mm. long; anthers glabrous. 2. M. ludoviciana. 



1. Myzorrhiza multiflora (Nutt.) Rydb. (Orobranche multiflora Nutt. ; 

 Aphyllon multiHorum A. Gray) In sandy soil from Colo, and Utah to Tex. 

 and Ariz. — Along the McElmo ; Dixon Canon. 



2. Myzorrhiza ludoviciana (Nutt.) Rydb. (O. Ludoviciana Nutt.; Aphyl- 

 lon Ludovicianuvi A. Gray) In sandy soil from Ills, and Wash, to Tex. and 

 Calif. — North Denver, near Argos (Easlzi'ood). 



2. THALESIA Raf. C.\ncer-root. 



I. Thalesia fasciculata (Nutt.) Britton. Parasitic on Composites, espe- 

 cially Artemisia frigida, from Ind. and Yukon to Colo, and Calif.; also Mex. 

 — Alt. 4000-11,000 ft. — Near Boulder; Silver Plume; West Spanish Peak; 

 Como, South Park; Salida; Garden of the Gods; Table Mountain; Golden; 

 Arboles; Ft. Collins; Dolores; Table Rock; Fossil Creek; Quimby; Soldier 

 Canon. 



Family 123. MARTYNIACEAE Tink. Unicorn-plant Family. 



I. MARTYNIA L. Unicorn-plant; Ram's-horn. 



I. Martynia Louisiana Mill. {M. prohoscoidca Glox.) In waste places 

 from Me. and Iowa to N. C. and Colo. — Ft. Collins ; Caiion City. 



Order 45. PLANTAGINALES. 



Family 124. PLANTAGINACEAE Lindl. Plantain-Family. 



I. PLANTAGO L. Plantain. 



Flowers all perfect ; corolla not closed over the fruit ; stamens 4. 



Leaves lanceolate to ovate; neither leaves nor spike silky-pubescent; stamens 

 in all the flowers long-exserted. 

 Spike cylindrical ; seeds not concave on the faces. 



Leaves ovate, abruptly contracted at the base ; seeds more than 2 in 

 each cell. 

 Pyxis dehiscent at the middle, rounded-ovoid, obtusish ; leaves usually 



thick and the dense spike obtuse. i. P. major. 



Pyxis dehiscent far below the middle, elongated-ovoid, very acute; 

 leaves thin and the lax spike acute. 2. P. asiatica. 



Leaves lanceolate, gradually tapering into the petioles ; seed not more 

 than 2 in each cell. 

 Leaves thin ; plant not woolly at the base. 3. P. Tweedyi. 



Leaves thick ; plant with red or brown wool at the base. 



4. P. eriopoda. 

 Spike short, oblong, 1-3 cm. long; seeds concave on the faces; leaves nar- 

 rowly lanceolate. 5- P- lanceolata. 

 Leaves linear; leaves and peduncles pubescent with long silky hairs; anther 

 in the more fertile flowers included ; seeds solitary in each cell ; concave on 

 the faces. 6. P. Purshii. 

 Flowers subdioecious or polygamo-dioecious ; corolla in the fertile plant remain- 

 ing closed or early closing over the capsule ; stamens 2 ; leaves filiform. 



7. P. niyosuroides. 



