2576 



PHASEOLUS 



PHASEOLUS 



AA. Fls. not yellow. 



B. Petioles of primary Ivs. less than - 2 7 6 - in. (7 mm.) long. 

 8. acutifdlius, Gray, var. latifSlius, G. F. Free- 

 man. TEPARY. Fig. 2891. Annual, erect on poor or 



2897. Long-podded forms of Phaseolus vulgaris. 



dry land, under more favorable growth - conditions 

 sts. recumbent, spreading or twining, 1^-9 ft. long, 

 glabrous to puberulent : Ivs. smooth above with slightly 

 prominent veins beneath, glabrous 

 throughout or slightly puberulent 

 below; Ifts. entire, ovate to broadly 

 lanceolate, %-2 in. wide (average 

 width 1^2 in.), acuminate, stipel- 

 late; stipules lanceolate, ^jin. long, 

 striate, appressed; petioles slender, 

 14 in. long: peduncles shorter than 

 the Ivs., 2-5-fld.; bracts small, 

 deciduous: fls. medium-sized, pedi- 

 cellate, white or pale violet, few at 

 the end of an axillary peduncle 

 which is usually shorter than the 

 Ivs.; calyx short, broadly campanu- 

 late, 4-toothed (the upper 2 lobes 

 united into 1), teeth acuminate; 

 banner broad, emarginate, in fl. 

 more than half reflexed, at the base 

 biauriculate, ^-%in. long: pod flat- 

 tened and coriaceous when young, 

 when mature papery, 2-7-seeded, 

 2-3]/2 in. long, ^-%in. broad, 

 straight or slightly curved, with 

 prominent beak; seeds white, yel- 

 low, brown, or bluish black, either 

 self-colored or variously flecked, 

 round-oval to nearly round as is 

 the navy, to strongly flattened like 

 a diminutive lima; average weight 

 .10-.20 gram. S.W. U. S. 

 and Mex. Cult, by the 

 Indians and Mexicans of 

 the southwestern desert 

 region. Recently intro. by 

 the Arizona Agric. Exp. Sta. 

 as a very promising drought- 

 resistant dry shell bean for 

 hot semi-arid regions. See 

 Bean, Tepary, p. 462; also 

 Ariz. Agric. Exp. Sta. Bull. 

 No. 68 (1912). 



BB. Petioles of primary Ivs. 



Y^in. (10 mm.) long or 



longer. 

 c. Cotyledons not raised 



above the ground in 



the seedling. 



9. multifldrus, Willd. 

 SCARLET RUNNER BEAN. 

 DUTCH CASE-KNIFE BEAN 

 (a white variety). Figs. 

 2892-2894. Root thickened 

 and tuberous, sometimes 

 perennial in the S., but per- 

 ishing in the N. : plant tall, 



2898. Leaves of Phaseolus 

 lunatus. Two upper ones, Wil- 

 low Leaf, a very narrow-leaved 

 form of the Sieva type ; middle 

 one, Potato Lima; lowest one, 

 Large White Lima, the two 

 latter being var. macrocarpus. 



twining and slender, minutely pubescent: Ivs. large; 

 Ifts. thin, terminal Ifts. often 3 in. or more wide, rhom- 

 bic-ovate and acute, scabrous-pubescent: fls. rather 

 large and showy, on long naked racemes, in the Scarlet 

 Runner type red, in the Dutch Case-Knife white, the 

 keel not distinctly projecting: pods long (3-6 in.), 

 with curved slender tip; seeds large (^sin. long or 

 longer), much flattened or nearly cylindrical, less than 

 twice as long as broad, not usually reniform, no con- 

 spicuous lines radiating from the hilum, color red or 

 mahogany, and black in the Scarlet Runner, white in 

 many other forms: primary Ivs. ovate or cordate, the 

 base deeply auriculate, petioles 1 in. or more long. S. 

 Amer. or Mex., but now widely spread. The Scarlet 

 Runner form is popular as an ornamental vine for 

 arbors and to cover windows, sometimes being known 

 as Flowering Bean or Painted Lady. The Dutch Case- 

 Knife is a vegetable-garden plant, grown for its beans. 

 Various forms of the plant are grown for food by the 

 Mexicans and these sometimes appear in our western 

 country. Here belong the Aztec or prehistoric beans, 

 now grown sparingly in N. Ariz., which are said to 

 have originated from seed found in caches among 

 the prehistoric cliff-dwellings. Melde's Perennial and 

 Irvine's Hybrid beans are apparently white-fld. forms. 

 The color of fl. and seed seems always to be associated 

 in this species. A dwarf or bush form, probably of P. 

 multiflorus, was intro. a few years ago as Bartelde's 

 Dwarf Lima (see Bull. No. 87, Cornell Exp. Sta.). It is 

 not unlikely that more than one species is passing as 

 P. multiflorus, some of the Mexican forms being 

 imperfectly understood. 



cc. Cotyledons raised above the ground in the seedling 



stage. 

 D. Fl.-bracts large, conspicuous, oval. 



10. vulgaris, Linn. COMMON BEAN. KIDNEY BEAN 

 of the English. HARICOT of the French. Figs. 2895- 

 2897. Erect or twining (on poor or dry soil many varie- 

 ties are erect which are twining in more moist or fertile 

 land; some varieties, however, retain the bush form 

 under the most favorable conditions): mature plants 

 more or less pubescent: Ifts. rhombic-ovate or ovate, 

 acuminate: peduncles shorter than the petioles, few- 

 fld. at or near the apex: fls. small, white, yellowish or 

 blue-purple: pod slender, somewhat curved, provided 

 with a straight or curved 

 tip, fleshy when young and 

 either green or light yel- 

 lowish wax-color ; length of 

 mature seed less than 

 ^in., average weight more 

 than .20 gram, no con- 

 spicuous lines radiating 

 from the hilum: primary 

 Ivs. entire, cordate, deeply 

 auriculate, dull green, 

 slightly rough from fine 

 scattered hispid pubes- 

 cence, their petioles dis- 

 tinctly pubescent. Both 

 seed and plant characters 

 very variable. There are 

 probably about 200 dis- 

 tinct types, which include 

 between 400 and 500 

 named commercial varie- 

 ties. Here are included all of both bush and running forms 

 of which the pods are used as green snap beans as well 

 as the dry shell-bean type like the Navy, Boston Pea, 

 and California Tree bean. The seven species of com- 

 mon beans (P. vulgaris, Savi, P. compressus, Mart., P. 

 gonospermus, Savi, P. carindtus, Mart., P. oblongus, 

 Savi, P. ellipticus, Mart., P. sphasricus, Mart.) which 

 were separated by George von Martens (Die Garten- 

 bohnen, 1860) according to the shape and size of 



2899. Pods of Sieva, Large 

 Lima, Potato Lima. The last two 

 are forms of P. lunatus var. 

 macrocarpus. 



