320 OROBANCHACEAE. 



i. MYZORRHIZA Philippi. BROOM-RAPE. 



Corolla 20-25 mm. long; anthers woolly. i. M. multifiora. 



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



1. Myzorrhiza multiflora (Nutt.) Rydb. (Orobranche multi-flora Nutt; 

 Aphyllon multiflorum 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 Ludovicianum A. Gray) In sandy soil from Ills, and Wash, to Tex. and 

 Calif. North Denver, near Argos (Eastwood}. 



2. THALESIA Raf. CANCER-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 Link. UNICORN-PLANT FAMILY. 



i. MARTYNIA L. UNICORN -PLANT ; RAM'S-HORN. 



i. Martynia Louisiana Mill. (M. proboscoidea Glox.) In waste places 

 from Me. and Iowa to N. C. and Colo. Ft. Collins; Canon 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. myosuroides. 



