Table 2(b).

Root hair numbers in mesophytic grasses*

Species	No. mm −1 root length	Approx. no. mm −2 root surface	Reference
Lolium perenne	88	ND	Reid (1981)
L. perenne	30	40	Robinson and Rorosin (1987)
L. perenne	45	108	Föhse et al. (1991)
L. multiflorum	98	142	Drew and Nye (1969)
L. rigidum	300	ND	Hill et al. (2010)
L. rigidum	50	62	Schweiger et al. (1995)
Festuca rubra	30	67	Boot and Mensink (1990)
Triticum aestivum	46	95	Föhse et al. (1991)
Zea mays	161	ND	Reid (1981)
Microlaena stipoides†	900	1150	Hill et al., (2010)
Eragrostis pallens	10, 4·5‡	ND	Bailey and Scholes (1997)
Zea mays§	22	50	Moreno-Espindola et al. (2007)
Cynodon dactylon§	24	30	Moreno-Espindola et al. (2007)
Saccharum sp.§	140–870¶	ND	Evans (1938)
Poa pratensis§	480	318	Dittmer (1958)
Secale cerale§	570	318	Dittmer (1958)

ND, not determined.

* Where only root hair numbers per mm⁻¹ root length, or per mm⁻² were given, the other density has been calculated here if root diameter measurements were available.

^† Australian native perennial.

^‡ High number in 80 % sand, low number in 30 % sand.

^§ Only these plants were field-grown, all others were seedlings or young plants grown in pots.

^¶ Comparable numbers from two different cultivars.