46 



THE CACTACEAE. 



Type locality: Tucuman, Argentina. 



Distribution: Northwestern Argentina. 



This little plant has flowered frequently both in Washington and New York, often as 

 early as March; the flowers open in the morning and close at night, opening for four days 

 consecutively and then followed in a few days by the small scarlet fruits. 



Fig. 58. Rebutia pseudominuscula. 



This plant is so small that when grown alone it is quite inconspicuous, but de Laet has 

 grown it very successfully as a graft on one of the cylindric cacti. When grown this way it 

 gives off many new plants, forming a cespitose mass and flowering freely. De Laet also 

 lists in his Catalogue the variety cristatus under Echinocactus minusculus. 



Illustrations: Bliihende Kakteen 1: pi. 31; Schumann, Gesamtb. Kakteen f. 67; 

 Curtis's Bot. Mag. 140: pi. 8583; Monatsschr. Kakteenk. 26: 152, 153; 29: 141; Tribune 

 Hort. 4: pi. 140; Kirtcht, Kakteen Zimmergarten 9; De Laet, Cat. Gen. 3. f. 2, asEchino- 

 cactus minusculus; Monatsschr. Kakteenk. 5: 103. 



Plate iv, figure 5, shows a flowering plant sent to the New York Botanical Garden from 

 the Missouri Botanical Garden in 191 2. Figure 57 is from a photograph contributed by 

 Dr. Spegazzini. 



2. Rebutia fiebrigii (Giirke) Britton and Rose, 



Stand. Cycl. Hort. Bailey 5: 2915. 1916. 



Echinocactus fiebrigii Giirke, Notizbl. Bot. Gart. 

 Berlin 4: 183. 1905. 



Globose, depressed at apex, 5 cm. high, tuber- 

 culate; areoles elliptic; spines 30 to 40, setaceous, 

 1 cm. long, white, or the longest ones brownish at 

 apex and 2 cm. long or more, porrect, acicular; 

 flowers from the side of the plant, 2 cm. long, slen- 

 der, funnelform, red, bent upwards; scales on the 

 ovary small, woolly, and bristly ; fruit small, puqole ; 

 inner perianth-segments oblong, acute. 



Type locality: Bolivia, at Escayacje, alti- 

 tude 3,600 meters. 



Distribution: Known only from the type 

 locality. 



This is a very attractive little plant which 

 Dr. Rose saw in the Berlin Botanical Garden 

 in 1 9 1 2 . A specimen was sent from the Berlin 

 Botanical Garden to the New York Botanical 

 Garden which we have also studied. The plant 

 is named for Dr. C. Fiebrig, director of the 

 Museum and Garden at Asuncion, Paraguay. Fig. 59- Rebutia fiebrigii. 





